CN107592073B - A kind of acceleration test apparatus for solar battery Study on output characteristic - Google Patents
A kind of acceleration test apparatus for solar battery Study on output characteristic Download PDFInfo
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Abstract
The invention belongs to technical field of solar batteries, particularly relate to a kind of acceleration test apparatus for solar battery Study on output characteristic.The device of the invention mainly includes light source analogy module, characteristic of solar cell parameter detection module, auxiliary heat dissipation module, power module, information exchange module and control module.Pass through the programming Control to LED array module, the simulation to a variety of light environments can be achieved, the illumination variation etc. under the conditions of illumination variation and various uneven distributions when illumination variation when main analog object includes constant illumination simulation, illumination variation when day alternates with night, cloud cover, solar cell surface area ash.Single-chip microcontroller issues control instruction to LED array first, control LED array switchs to control the light on and off of LED, PWM light adjusting circuit is controlled to control luminous intensity, after LED light source output is stablized, the output characteristic curve of single-chip microcontroller acquisition solar battery, the data storage of acquisition in a storage module, is sent to host computer by communication module.
Description
Technical field
The invention belongs to technical field of solar batteries, particularly relate to a kind of for solar battery output characteristics
The acceleration test apparatus of research.
Background technique
With the swift and violent growth of global photovoltaic power generation installation amount, improves the generating capacity of solar battery, reduces solar energy
Cell power generation cost becomes market and research institution's question of common concern.And the detection of solar cell properties is correlative study
An important component in work.
Currently, carrying out solar battery performance detection in industry mainly uses standard sunlight simulation system.Based on this
The performance detection of class system is only capable of providing solar battery sheet (light intensity 1000W/m2,25 DEG C of environment temperature) under standard environment
Performance parameter, such as patent CN200810025522, CN201120157321, CN201510176550, CN201610158286 and
CN201521084076。
However, since the practical light environment that solar battery faces is extremely complex, and be easy to be interfered, such as photovoltaic electric
Pond piece partial occlusion, superficial dust, day alternates with night, and the factors such as uneven incidence, therefore, how effective rapid evaluation sun
The problem of long-term generating capacity of energy battery is tried to explore as industry.
Patent CN201410377749 provides a kind of light-source system of adjustable intensity of illumination, but it only can be realized illumination
The adjustment of intensity can not simulate heteropical illumination interference, while its control system can not achieve to day and night change etc.
The simulation of illumination variation process.
Patent CN201510036277, proposes a kind of photic decay detection device, which is placed on more by control
Solar battery in angle rotary shaft and with highly controllable light source multi-angle rotary axis, to simulate natural light in practice
Situation and color temperature change are gone up and down, but it cannot simulate heteropical illumination interference, while not have the item for carrying out accelerated test
Part.
In conclusion prior art is not able to achieve long-term power generation under the conditions of complex illumination to solar battery
Performance is assessed.
Summary of the invention
The object of the present invention is to overcome the shortcomings of existing technologies, a kind of illumination variation simulation and solar battery are provided
Device for detecting performance realizes the various illumination variation environment of analog, in specific implementation, changes and amounts to 862617600 kinds of illumination
Variation.By loading these illumination variation environment to solar battery, its performance is detected, may be implemented to solar-electricity
Pond performance is most comprehensively analyzed, while being controlled by the acceleration to illumination variation time interval, and test week can be effectively accelerated
Testing efficiency is significantly increased in phase.By external heat radiation unit, influence of the temperature to LED output power is maximally reduced.
The technical scheme is that
A kind of experimental rig for solar battery Study on output characteristic, which is characterized in that including light source analogy module,
Characteristic of solar cell parameter detection module, auxiliary heat dissipation module, power module, information exchange module and control module；
The light source analogy module provides a variety of illumination variation tests for simulating outdoor illumination variation, for solar battery
Condition；The light source analogy module is connect with power module and control module respectively；
The characteristic of solar cell parameter detection module is for detecting the characteristic curve that solar battery externally exports, institute
Characteristic of solar cell parameter detection module is stated to connect with solar battery and control module respectively；
The auxiliary heat dissipation module is used to provide heat dissipation for light source analogy module, and guarantee light source analogy module stablizes fortune
Row；The heat sink that auxiliary heat dissipation module is made primarily of metal, the aluminum substrate pasted with light source analogy module by heat conductive silica gel,
The aluminum substrate is pasted and fixed on heat sink by heat conductive silica gel, is had radiating groove on heat sink, is installed on the radiating groove
There is fan；
The power module is used to be light source analogy module, characteristic of solar cell parameter detection module, auxiliary heat dissipation mould
Block, information exchange module and control module provide power supply；
The information exchange module is connect with control module, for providing device and extraneous much information interactive mode；
Intensity of illumination including liquid crystal display, speech player, communication module, for the current LED array circuit output of real-time display
And the data of characteristic of solar cell parameter detecting system acquisition；When system jam or exception, voice prompting event
Barrier；And data are sent to host computer by communication module；
The control module is used to control the period of change of the illumination mode of light source analogy module, and acquisition solar-electricity
The data of pond characterisitic parameter detection module, and carry out the storage and transmission of data；Single-chip computer control system is such as used, is light source die
Quasi- module offer simulation cycle is controllable, LED array light on and off, data acquisition, stores and the controls such as transmission.
Further, the light source analogy module includes multiple LED arrays, LED drive circuit, LED control switch and PWM
Light adjusting circuit；The corresponding power module includes DC-DC voltage regulator circuit and AC-DC reduction voltage circuit；Then PWM light adjusting circuit with
The connection of DC-DC voltage regulator circuit, PWM light adjusting circuit, LED control switch, LED drive circuit and LED array are sequentially connected；It is described
LED drive circuit is connect with AC-DC reduction voltage circuit；The control module respectively with LED drive circuit, LED control switch and PWM
Light adjusting circuit connection, control module can control each LED drive circuit, LED control switch and PWM light adjusting circuit respectively, make
Each LED array can provide the illumination of different brightness, to provide a variety of illumination variations for solar battery to be measured.
The output voltage range of PWM light adjusting circuit is 0~2.5V, and the intensity of illumination and PWM light adjusting circuit of LED array are at just
Than, change step can independently be set according to user demand, therefore, the control of PWM light adjusting circuit variation type be 2.5V divided by
Step-length adds 1, i.e. 2.5V/ step-length+1 again.By controlling the PWM light adjusting circuit, so that PWM light adjusting circuit exports different control
Signal controls the size of the LED drive circuit electric current, and the PWM light adjusting circuit output voltage is higher, flow through the LED and drive
The electric current of dynamic circuit is bigger, and the LED array brighter display, on the contrary, output voltage is smaller, driving current is smaller, LED gusts described
Column brightness is darker.So as to realize the simulation of illumination power variation.
LED control switch is connected with the LED drive circuit, controls the LED by controlling the LED control switch
The conducting and shutdown of driving circuit, switch closed condition indicate that disconnection is indicated with Binary Zero with binary one.LED control switch
202 are combined into a binary code from high to low, i.e. LED control switch 6 is highest order, and LED control switch 5 is a time high position,
And so on, LED control switch 1 is lowest order, and is denoted as LED_STATE, the value range of LED_STATE are as follows:
000000 (B)~111111 (B), then the state of LED control switch changes with regard to a shared 26=64 kind, that is, for illumination
Distributed controll have in 64 and change.
Simultaneously, it is contemplated that LED control switch has certain control sequence requirement, therefore, according to permutation and combination principle,
The closure control sequence of LED control switch co-exists inKind variation, shutdown sequence and closing order one
It causes, there is also 720 kinds of variations.
PWM light adjusting circuit and LED control switch are combined according to permutation and combination method and control LED array, by arranging
Combinatorial principle is it is found that the illumination variation theoretically analog of LED array 10 goes out the change of 26*64*720*720=862617600 kind
Change.The case where due to natural lighting variation, such as photovoltaic cell partial occlusion, depositing dust process, rainfall, day alternates with night illumination
Variation accelerates dust stratification process and situations such as shadow occlusion, can be by light intensity to LED array and illumination patterns to arrange
The control of combination carrys out equivalent simulation.Including but not limited to following control method.
(1) morning and the afternoon each 6 that one day 12 hour is simulated by the closure or closing of 6 paths of LEDs control switches are small
When illumination whether there is or not controls；
(2) by controlling the voltage value size of PWM light adjusting circuit come the strong and weak changing rule of illumination simulation；
(3) it is opened by the sequence of LED control switch 1-2-3-4-5-6, then orderly close-down LED control switch 1-2-3-
4-5-6, can the equivalent simulation variation illumination condition that periodically day alternates with night；
(4) it controls the voltage of PWM light adjusting circuit by successively decreasing and reduces LED output intensity, i.e., according to a period of change
Inside successively decrease 0.1V, the uniform depositing dust rule of simulation photovoltaic assembly surface；
(5) by successively decrease control PWM light adjusting circuit during, at a time will be at the beginning of the output of PWM light adjusting circuit
Beginningization arrives maximum value, for simulating reception light characteristics of the photovoltaic cell after over cleaning；
(6) by the arbitrary portion opening and closing of control LED control switch 1~6, analog photovoltaic cell receives light
According to the light characteristics in the case of partial occlusion；
(7) it by increasing or reducing the period of change of LED control switch and PWM light adjusting circuit, realizes and accelerates or slow down survey
Try the period.
Further, the characteristic of solar cell parameter detection module is controllable electronic load circuit, including DA is converted
Device, converter, resistance, sampling resistor and power switch tube；Wherein, solar battery anode to be measured connects power switch tube drain electrode
With an input terminal of converter, solar battery cathode to be measured connects one end and ground of sampling resistor, sampling resistor it is another
The output of another input terminal of termination power switching tube source electrode and converter, converter terminates control module；Power is opened
The grid for closing pipe is followed by the output end of D/A converter by resistance, and the input of D/A converter terminates control module；Control module is logical
The size for crossing the resistance value of adjustment resistance, realizes the controllability of characteristic of solar cell parameter detecting.
It is controlled by SCM program, increases or reduces the system illumination simulation transformation period period, can accelerate or slow down
The test period of solar battery sheet improves testing efficiency.By real-time collecting temperature value, judge that LED caused by temperature is defeated
The attenuation ratio of light intensity out controls to adjust PWM light adjusting circuit by negative-feedback circuit, so that intensity of illumination is in same test-strips
Export constant under part, the negative-feedback circuit is arranged between control module and PWM light adjusting circuit, and control module passes through negative-feedback
Circuit controls to adjust PWM light adjusting circuit so that intensity of illumination export under same test condition it is constant, method particularly includes:
The output power and temperature for setting LED array are at exponential relationship:
Wherein, k1 is LED peak power output, and K2 is temperature decline coefficient, and y is the real-time output power of LED array, t
For current LED array operating temperature；
Because output power is in a linear relationship with intensity of illumination, therefore y is also LED array intensity of illumination, is enabled:
Y (0)=Ymax_stc
Ymax_stcFor the rated output power of LED array at the standard conditions, due to LED illumination intensity and PWM light modulation electricity
The output P on road is directly proportional, and proportionality coefficient is set as K, then the output of PWM light adjusting circuit is P=K*y (t)；Temperature decline coefficientTmax is LED maximum operation temperature, and 25 be room temperature value, the output of PWM light adjusting circuit other conditions not
When change, if temperature increases, control module acts on PWM light adjusting circuit by the light intensity feedback compensation circuit, so that
The output of PWM light adjusting circuit is executed according to P (t).
While illumination variation simulation, the SCM system is by controlling the characteristic of solar cell parameter detecting
The conducting degree of metal-oxide-semiconductor does not lead solar battery progress I-V curve scanning to adjust the size of its resistance value in circuit
When logical, the resistance value of controllable electronic load circuit is close to infinity, and electric current is 0A at this time, and voltage is open-circuit voltage Voc,
When fully on, the resistance value of controllable electronic load circuit is close to 0 ohm, and electric current is short circuit current Isc at this time, and voltage is
0V。
After solar battery is connect with apparatus of the present invention, electric current is flowed through by anode interface by metal-oxide-semiconductor and precision resister
The controllable electronic load circuit built flows back to solar battery cathode by cathode interface, while AD Acquisition Circuit is to high-precision
The voltage of voltage and the metal-oxide-semiconductor drain electrode at sampling resistor both ends over the ground, after sending the voltage value of acquisition to SCM system processing,
The voltage and current value of solar battery can be obtained.The resistance value of controllable electronic load is controlled by the single-chip computer control system
Size, to realize to solar cell I-V curve all working state point voltage, electric current, irradiation, the detection of temperature value.It is single
Piece machine control system sends data communication module for the data after acquisition process and is sent to host computer processing.
Beneficial effects of the present invention are, by the programming Control to LED array module, it can be achieved that a variety of light environments
Simulation, main analog object include constant illumination simulation, illumination variation when day alternates with night, light when photovoltaic cell portion blocks
The illumination variation etc. under the conditions of illumination variation and various uneven distributions when according to condition, solar cell surface area ash.
Single-chip microcontroller issues control instruction to LED array first, controls the light on and off and luminous intensity of LED array, after LED light source output is stablized,
Single-chip microcontroller acquires the output characteristic curve of solar battery, and the data storage of acquisition in a storage module, then passes through communication module
It is sent to host computer processing analysis.
Detailed description of the invention
Fig. 1 is the surface structure schematic diagram of device described in the invention；
Fig. 2 is the logic theory signal of illumination variation simulator of the present invention and characteristic of solar cell electrical parameter detection circuit
Figure；
Fig. 3 is the functional diagram of illumination variation simulator and characteristic of solar cell electrical parameter detection circuit of the present invention；
Fig. 4 is the working principle diagram of illumination variation simulator and characteristic of solar cell electrical parameter detection circuit of the present invention；
Fig. 5 is controllable electronic load circuit fundamental diagram of the present invention.
Specific embodiment
Below with reference to specific attached drawing, the present invention is described in further detail:
As shown in Figure 1, the present invention devise a kind of simulation of illumination variation and characteristic of solar cell parameter detection device with
And the lighttight outer container 80 of sealing.
As shown in Fig. 2, the device includes illumination variation analog circuit and characteristic of solar cell parameter detecting.Illumination variation
Analog circuit includes LED array circuit, AC-DC reduction voltage circuit, DC-DC voltage regulator circuit, heat-sink unit, control interface and fixation
The opaque shell 100 of LED array.The LED array circuit includes LED array 10, LED PWM light adjusting circuit 201, LED control
Make switch 202, driving circuit 203.Characteristic of solar cell parameter detecting system includes that I-V curve acquisition module 30, temperature are adopted
Collect module, intensity of illumination acquisition module, display simulation, voice module, wired and wireless communication module, outer memory module, electricity
Source interface, control interface and single-chip computer control system.The I-V curve acquisition module mainly includes using metal-oxide-semiconductor 303 as negative
Adjustable electronic load circuit, AD Acquisition Circuit, irradiation temperature detection Acquisition Circuit and the solar battery positive and negative anodes interface of load
70。
The LED array 10 of the illumination variation simulator is fixed on heat-sink unit 100 by heat conductive silica gel, described to dissipate
Hot cell fixed on the shell 80.The LED drive circuit 203 passes through connecting line 60 and the road LED multi-path array Zhong Mei
It is connected one by one, the PWM light adjusting circuit 201 is connected with LED drive circuit 203, and the AC-DC reduction voltage circuit is LED driving electricity
Road 203 provides the DC power supply of wide input range, and the DC-DC voltage regulator circuit is PWM light adjusting circuit 201 and solar battery
Characterisitic parameter detection system 30 is powered.
The illumination variation simulator is examined by power interface 40 and control interface 50 and characteristic of solar cell parameter
Examining system 30 connects.
The I-V curve acquisition module, data disaply moudle, voice module, data communication module, outer memory module are equal
Respectively independent to connect with single-chip computer control system, the power interface is connected with the DC-DC voltage regulator circuit, is described in other
Module provides stable DC source, and the positive and negative anodes interface 70 of the solar battery 90 is respectively with described by metal-oxide-semiconductor 303 and height
The drain electrode that precision samples the electronic load that 302 resistance are built is connected with ground wire.
When solar battery 90 accesses the characteristic of solar cell parameter of curve detection circuit, by solar battery 90
It is connect by positive and negative anodes interface 70 with apparatus of the present invention.
The LED drive circuit is connect with AD-DC reduction voltage circuit, and AC-DC reduction voltage circuit is LED array or even whole device
Enough electric currents and voltage are provided.
Fig. 3 show the variation type and circuit control strategy of illumination, shown in Fig. 4, for the illumination of apparatus of the present invention simulation
Changing environment control principle, as follows:
Single-chip computer control system drives PWM light adjusting circuit 201, includes D/A converter, exportable control inside PWM light adjusting circuit
Voltage signal processed, range are 0~2.5V.The output voltage signal of the output electric current and PWM light adjusting circuit of LED drive circuit 203
Directly proportional, when 0V, when electric current 0,2.5V, electric current is maximum.
LED control switch 202 can control the connection and shutdown of LED drive circuit 203 Yu PWM light adjusting circuit 201, therefore,
It by the control to different switches, turns it on or turns off, that is, can control the light on and off of a certain column of corresponding LED array 10.
As shown in figure 3, to the PWM light adjusting circuit 201 and LED control switch 202, LED drive circuit 203 according to arrangement
Combined mode is controlled, and the illumination condition of various change situation can be simulated.Such as
(1) in the case where all closures of LED control switch 202, the output area of PWM light adjusting circuit 201 from 0V~
The variation of 2.5V is, it can be achieved that the variation of illumination from weak to strong.Assuming that the change step of control voltage is 0.1V, then one is shared
2.5V/0.1V+1=26 planting the illumination variation of intensity of illumination.
(2) assume that PWM light adjusting circuit output voltage is invariable, it, can by controlling the closure and shutdown of LED control switch
Realize that the light on and off to LED array control.Switch closed condition indicates that disconnection is indicated with Binary Zero with binary one.LED control is opened
It closes 202 and is combined into a binary code from high to low, is i.e. LED control switch 6 is highest order, and LED control switch 5 is time height
Position, and so on, LED control switch 1 is lowest order, and is denoted as LED_STATE, the value range of LED_STATE are as follows:
000000 (B)~111111 (B), then the state of LED control switch 202 shares 2 with regard to one6=64 kinds of variations, that is, for
The distributed controll of illumination, which has in 64, to be changed.
Simultaneously, it is contemplated that there are the requirements of certain control sequence for LED control switch 202, therefore, according to permutation and combination original
Reason, the closure control sequence of LED control switch 202 co-exist inKind variation, shutdown sequence and closure
Sequence consensus, there is also change in 720.
This closure and disconnection control sequence of LED control switch 202, can simulate the change of various natural lighting environment
Change.For example, within a fixed cycle, preceding half period, LED control switch 202 according to switch 1-2-3-4-5-6 sequence according to
The secondary time interval according to program setting is closed, in second half of the cycle, according to the sequence of switch 1-2-3-4-5-6 according still further to journey
The time interval of sequence setting is opened, i.e., rising day for one time of analog changes with sunset.The time interval of program setting is general
It is equivalent to one day time hour.
PWM light adjusting circuit 201 and combining for LED control switch 202 are controlled into LED array, by permutation and combination principle
It is found that the theoretically shared 26*64*720*720=862617600 kind variation of the illumination variation simulation of LED array 10.Therefore,
The illumination variation simulator can cover all situations of natural lighting variation, including photovoltaic cell partial occlusion, table substantially
Situations such as area ash and shadow occlusion.Including but not limited to following method.
(1) morning and the afternoon each 6 that one day 12 hour is simulated by the closure or closing of 6 paths of LEDs control switches are small
When illumination whether there is or not controls；
(2) by controlling the voltage value size of PWM light adjusting circuit come the strong and weak changing rule of illumination simulation；
(3) it is opened by the sequence of LED control switch 1-2-3-4-5-6, then orderly close-down LED control switch 1-2-3-
4-5-6, can the equivalent simulation variation illumination condition that periodically day alternates with night；
(4) it controls the voltage of PWM light adjusting circuit by successively decreasing and reduces LED output intensity, i.e., according to a period of change
Inside successively decrease 0.1V, the uniform depositing dust rule in equivalent simulation photovoltaic module surface；
(5) by successively decrease control PWM light adjusting circuit during, at a time will be at the beginning of the output of PWM light adjusting circuit
Beginningization arrives maximum voltage value, for simulating process of the photovoltaic cell through over cleaning；
(6) pass through the arbitrary portion opening and closing of control LED control switch 1-2-3-4-5-6, analog photovoltaic cell
Piece receives illumination partial occlusion condition；
(7) it by increasing or reducing the period of change of LED control switch and PWM light adjusting circuit, realizes and accelerates or slow down survey
Try the period.
It is controlled by SCM program, increases or reduces the system illumination simulation transformation period period, can accelerate or slow down
The test period of solar battery sheet improves testing efficiency.By real-time collecting temperature value, judge that LED caused by temperature is defeated
The attenuation ratio of light intensity out controls to adjust PWM light adjusting circuit by negative-feedback circuit, so that intensity of illumination is in same test-strips
It is exported under part constant.
The output power and temperature of LED array are at exponential relationship, general type are as follows:k1It is defeated for LED maximum
Power out, K2For temperature decline coefficient, y is the real-time output power of LED array, and t is current LED array operating temperature, is considered
It is in a linear relationship with intensity of illumination to output power, therefore y is also LED array intensity of illumination.Due to being the solar irradiation of simulation
Intensity, thus k1 be LED array at the standard conditions (25 degree of environment temperature, pwm control circuit output maximum) measure it is specified
Output power, k1=1000.LED is exported simultaneously as LED illumination intensity is directly proportional to the output P of PWM light adjusting circuit, and PWM is defeated
Maximum value is 5 out, then K=5/1000=0.005.The then output P=0.005*y (t) of PWM light adjusting circuit.If current LED operation
Temperature is 40 degree, and maximum operating temperature is 100 degree, then k2=0.15,PWM light adjusting circuit
Output when other conditions are constant, if temperature increases, single-chip microcontroller acted on by the light intensity feedback compensation circuit
PWM light adjusting circuit, so that the output of PWM light adjusting circuit is executed according to P (t).
For example, setting illumination variation hour time interval in said device 2 seconds, then the illumination variation on daytime is simulated
Only need 24 seconds.Illumination variation test in one month only needs 720 seconds, and illumination variation simulation in 1 year needs 8640 seconds.By light
It is set as in said device 1 second according to variation time hour, then the illumination variation for simulating daytime only needs 12 seconds.One month light
360 seconds only are needed according to variation test, illumination variation simulation in 1 year then only needs 4320 seconds
While optical analog, characteristic of solar cell parameter detecting system 30 starts simultaneously, acquires current solar-electricity
The VA characteristic curve in pond, temperature and irradiation value.
As shown in figure 5, the VA characteristic curve of solar battery detects, by control I-V curve detection circuit can
The conducting degree of triode or metal-oxide-semiconductor 303 adjusts the size of its resistance value in control electronic load circuit, be not turned on when
It waits, the resistance value of controllable electronic load circuit is close to infinity, and the output electric current of solar battery is 0A at this time, and voltage is to open
Road voltage Voc, when fully on, the resistance value of controllable electronic load circuit is close to 0 ohm, the output electric current of solar battery
For short circuit current Isc, voltage 0V.The resistance value of controllable electronic load theoretically may be implemented from 0 ohm to infinitely great smooth
Variation.
After solar battery is connect with apparatus of the present invention, the electric current of solar battery is flowed through by anode interface 701 by MOS
The electronic load circuit that pipe and precision resister are built, flows back to cathode by cathode interface 702, while AD Acquisition Circuit 304 is right
The voltage of voltage and metal-oxide-semiconductor 303 drain electrode at 302 both ends of high precision sampling resistance over the ground, sends the voltage value of acquisition to monolithic
After the processing of machine system, the voltage and current value of solar battery can be obtained.It is controlled by the single-chip computer control system controllable
The resistance value size of electronic load, to realize to solar cell I-V curve all working state point voltage, electric current, irradiation, temperature
The detection of angle value.Single-chip computer control system sends data communication module for the data after acquisition process and is sent at host computer
Reason.
The heat sink that the auxiliary heat dissipation unit is made primarily of metal, the aluminium pasted with LED array by heat conductive silica gel
Substrate, the aluminum substrate are pasted and fixed on heat sink by heat conductive silica gel, have radiating groove on heat sink, on the radiating groove
Fan is installed.
Compared with prior art, of the invention to be a little: the illumination variation speeding-up simulation and characteristic of solar cell
Parameter detection device includes the Multipexer LED array of any illumination variation, characteristic of solar cell electrical parameter detection circuit, data
Memory module, display module, single chip control module, heat-sink unit, communication module.The Multipexer LED of any illumination variation
Array circuit can simulate the environment of any accidental light irradiation variation, while can also simulate dust stratification degree change condition, photovoltaic cell
The test condition of the illumination patterns unevenness such as piece partial occlusion；Characteristic of solar cell electrical parameter detection circuit can detecte solar energy
The parameters such as voltage, electric current, power, temperature, the irradiation intensity of battery, the controllable electronic load electricity that the special detection circuit uses
Road can adjust the resistance value size loaded between solar battery positive and negative anodes by program；Single-chip computer control system is main
For coordinating the operation of whole device, the supplemental characteristic of acquisition is saved in data memory module, and data are passed through into communication
Module is sent to host computer processing.
It should be noted that, in this document, such as " comprising " "comprising" or other any variants be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment, not only include which element, and
It and further include the other element that do not list explicitly, or further include that this composition, method, article or equipment institute are intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including institute
State in process, method, article or the equipment of element that there is also another identical elements.
Claims (2)
1. a kind of acceleration test apparatus for solar battery Study on output characteristic, which is characterized in that including light source analogy mould
Block, characteristic of solar cell parameter detection module, auxiliary heat dissipation module, power module, information exchange module and control module；
The light source analogy module provides a variety of illumination variation test-strips for simulating outdoor illumination variation for solar battery
Part；The light source analogy module is connect with power module and control module respectively；
The characteristic of solar cell parameter detection module for detecting the characteristic curve that solar battery externally exports, it is described too
Positive energy battery behavior parameter detection module is connect with solar battery and control module respectively；
The auxiliary heat dissipation module is used to provide heat dissipation for light source analogy module, guarantees the stable operation of light source analogy module；
The power module is used for as light source analogy module, characteristic of solar cell parameter detection module, auxiliary heat dissipation module, letter
It ceases interactive module and control module provides power supply；
The information exchange module is connect with control module, for providing device and extraneous much information interactive mode；
The control module is used to control the period of change of the illumination mode of light source analogy module, and acquisition solar battery spy
The data of property parameter detection module, and carry out the storage and transmission of data；
The light source analogy module includes multiple LED arrays, LED drive circuit, LED control switch and PWM light adjusting circuit；It is corresponding
The power module include DC-DC voltage regulator circuit and AC-DC reduction voltage circuit；Then PWM light adjusting circuit and DC-DC voltage regulator circuit connect
It connects, PWM light adjusting circuit, LED control switch, LED drive circuit and LED array are sequentially connected；The LED drive circuit and AC-
The connection of DC reduction voltage circuit；The control module is connect with LED drive circuit, LED control switch and PWM light adjusting circuit respectively, control
Molding block can control each LED drive circuit, LED control switch and PWM light adjusting circuit respectively；
The LED array can simulate the illumination test environment of various change by combination control method, if LED array shares 6
It is a, then it is corresponding that there are 6 LED control switches, it is 1-6 by LED control switch number consecutively, passes through arrangement and combination sequence
Open or close, backward open or close LED control switch 1-2-3-4-5-6, and photovoltaic cell test condition as needed
To adjust the voltage of PWM light adjusting circuit, it is possible to provide the illumination of different changing rules carrys out the changing environment of analog equivalent multiplicity, including
Illumination variation that day alternates with night simulation, accelerates dust stratification simulation, photovoltaic cell at the simulation of uniform depositing dust dust stratification process simulation, cleaning process
Partial occlusion simulation includes at least following to provide the equivalent test condition of various change for solar battery to be measured
Aspect:
(1) morning and each 6 hours of afternoon of one day 12 hour are simulated by the closure or closing of 6 paths of LEDs control switches
Whether there is or not controls for illumination；
(2) by controlling the voltage value size of PWM light adjusting circuit come the strong and weak changing rule of illumination simulation；
(3) it is opened by the sequence of LED control switch 1-2-3-4-5-6, then orderly close-down LED control switch 1-2-3-4-5-
6, it can the equivalent simulation variation illumination condition that periodically day alternates with night；
(4) it controls the voltage of PWM light adjusting circuit by successively decreasing and reduces LED output intensity, i.e., according to being passed in a period of change
Subtract 0.1V, to simulate the uniform depositing dust rule of photovoltaic assembly surface；
(5) by successively decrease control PWM light adjusting circuit during, at a time the output of PWM light adjusting circuit is initialized
To maximum value, for simulating reception light characteristics of the photovoltaic cell after over cleaning；
(6) by the arbitrary portion opening and closing of control LED control switch 1-2-3-4-5-6, analog photovoltaic cell is connect
Receive illumination partial occlusion condition；
(7) it by increasing or reducing the control period of change of LED control switch and PWM light adjusting circuit, realizes and accelerates or slow down survey
Try the period.
2. a kind of acceleration test apparatus for solar battery Study on output characteristic according to claim 1, feature
It is, further includes the negative-feedback circuit based on LED array operating temperature, the negative-feedback circuit is arranged in control module and PWM
Between light adjusting circuit, control module controls to adjust PWM light adjusting circuit by negative-feedback circuit, so that intensity of illumination is in same temperature
Output under the conditions of degree is kept constant, method particularly includes:
The output power and temperature for setting LED array are at exponential relationship:
Wherein, k1 is LED peak power output, and K2 is temperature decline coefficient, and y is the real-time output power of LED array, and t is to work as
Preceding LED array operating temperature；
Because output power is in a linear relationship with intensity of illumination, therefore y is also LED array intensity of illumination, is enabled:
Y (0)=Ymax_stc
Ymax_stcIt is defeated due to LED illumination intensity and PWM light adjusting circuit for the rated output power of LED array at the standard conditions
P is directly proportional out, and proportionality coefficient is set as K, then the output of PWM light adjusting circuit is P (t)=K*y (t)；Temperature decline coefficientTmax is LED maximum operation temperature, and 25 be room temperature value, the output of PWM light adjusting circuit other conditions not
When change, if temperature increases, control module acts on PWM light adjusting circuit by the negative-feedback circuit, so that PWM is dimmed
The output of circuit is executed according to P (t).
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| CN109347441A (en) * | 2018-11-21 | 2019-02-15 | 江苏启力新能源科技有限公司 | A kind of solar battery panel test device |
| CN112731975A (en) * | 2019-10-28 | 2021-04-30 | 苏州阿特斯阳光电力科技有限公司 | Method for adjusting inclination angle of tracking support of photovoltaic module |
| CN113300449B (en) * | 2021-05-27 | 2024-02-27 | 北京模电半导体有限公司 | LED solar lighting controller integrated circuit |
| CN117155279B (en) * | 2023-09-12 | 2024-03-08 | 西南石油大学 | Performance test system of solar cell |
| CN117335745B (en) * | 2023-11-29 | 2024-04-09 | 龙焱能源科技（杭州）有限公司 | Battery pack testing device |
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| CN102221669A (en) * | 2010-04-15 | 2011-10-19 | 财团法人工业技术研究院 | Measuring system for solar cell and sunlight simulator |
| CN202455590U (en) * | 2011-12-06 | 2012-09-26 | 重庆瑞升康博电气有限公司 | High-power intelligent LED power supply driver with innovative framework |
| CN107094335A (en) * | 2017-06-13 | 2017-08-25 | 广州中大中鸣科技有限公司 | The colour temperature brightness adjusting method and device of a kind of LED light comfort level |
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| CN102221669A (en) * | 2010-04-15 | 2011-10-19 | 财团法人工业技术研究院 | Measuring system for solar cell and sunlight simulator |
| CN202455590U (en) * | 2011-12-06 | 2012-09-26 | 重庆瑞升康博电气有限公司 | High-power intelligent LED power supply driver with innovative framework |
| CN107094335A (en) * | 2017-06-13 | 2017-08-25 | 广州中大中鸣科技有限公司 | The colour temperature brightness adjusting method and device of a kind of LED light comfort level |
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