CN217656599U

CN217656599U - Acquisition device and system for solar cell IV test

Info

Publication number: CN217656599U
Application number: CN202221504059.0U
Authority: CN
Inventors: 黄豪; 徐文浩; 陈寒寒; 李育良
Original assignee: Suzhou Maiyue Intelligent Technology Co ltd
Current assignee: Suzhou Maiyue Intelligent Technology Co ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-10-25
Anticipated expiration: 2032-06-16

Abstract

The utility model provides a collection system and system for solar wafer IV tests relates to solar energy technical field, thereby can be quick, accurate realization IV test required data's the collection generates the IV curve of 4 quadrants, and easy operation, be convenient for maintain and troubleshooting. The device comprises a case, a load power supply module, an analog power supply module and a load module; the load power supply module, the simulation power supply module and the load module are all inserted in the case in a drawer type manner; the load power supply module and the simulation power supply module are electrically connected with the load module; the load module comprises a plurality of data acquisition channels, and the data acquisition channels are respectively electrically connected with the monitoring sheet, the battery sheet to be tested and the data acquisition equipment; the load module is in communication connection with the main control equipment.

Description

A collection system and system for solar wafer IV test

Technical Field

The utility model relates to a solar energy technical field especially relates to an acquisition device and system for solar wafer IV tests.

Background

At present, the photovoltaic industry in China develops rapidly, and a relatively complete photovoltaic manufacturing industry system is formed. The solar cell technology is continuously broken through, and the cell slice is developed towards the direction of higher efficiency and larger size. The electrical performance test of the battery piece is crucial, and the battery piece has important effects on sorting products and ensuring the product quality. Through I-V characteristic curve measurement, parameters such as open-circuit voltage (Voc), short-circuit current (Isc), fill Factor (FF), efficiency (eta), series resistance (Rs), parallel resistance (Rsh) and the like can be obtained, the performance of the battery piece can be timely and accurately reflected, and guidance is provided for preparing a battery piece with higher performance.

At present, domestic IV test equipment has the problems of long-term dependence on import, high price, low test accuracy, small test range, long measurement period and the like. Especially, with the introduction of a large amount of cells in new processes such as HJT and large size, and the continuous improvement of production line energy production, the existing IV test equipment has been unable to meet the requirements of accurate measurement and faster production cycle of new cells.

Therefore, there is a need to develop a new collecting device and system for solar cell IV test to overcome the shortcomings of the prior art, so as to solve or alleviate one or more of the above problems.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an acquisition device and system for solar wafer IV tests, thereby can be fast, accurate realize that the required data's of IV test collection generates the IV curve of 4 quadrants, and easy operation, be convenient for maintain and troubleshooting.

On one hand, the utility model provides an acquisition device for solar wafer IV test, which is characterized in that the device comprises a case, a load power module, a simulation power module and a load module;

the load power supply module, the simulation power supply module and the load module are all inserted in the case in a drawer type manner; the load power supply module and the simulation power supply module are electrically connected with the load module;

the load module comprises a plurality of data acquisition channels, and the data acquisition channels are respectively electrically connected with the monitoring sheet, the battery sheet to be tested and the data acquisition equipment;

the load module is in communication connection with the main control equipment.

The above aspect and any possible implementation manner further provide an implementation manner, where the load module includes a load channel for performing voltage scanning on a measured battery piece, a voltage acquisition channel for acquiring a voltage signal of the measured battery piece, a current acquisition channel for acquiring a current signal of the measured battery piece, a light intensity acquisition channel for acquiring an ambient light intensity of the measured battery piece, and a temperature acquisition channel for acquiring an ambient temperature of the measured battery piece;

the load channel, the voltage acquisition channel and the current acquisition channel are respectively connected with the battery sheet to be tested;

the light intensity acquisition channel is connected with the monitoring sheet;

the temperature acquisition channel is connected with the temperature sensor.

The above aspects and any possible implementation manners further provide an implementation manner, wherein the temperature sensor comprises a temperature sensor arranged inside the monitoring sheet and an infrared temperature sensor used for collecting the surface temperature of the battery sheet to be detected.

The above aspects and any possible implementations further provide an implementation in which the monitor sheet is disposed near the battery sheet under test.

The above aspect and any possible implementation manner further provide an implementation manner, a battery material made of the same material as the battery sheet to be detected is flatly laid in the monitoring sheet, and the battery material is connected with the light intensity collecting channel.

The above aspect and any possible implementation manner further provide an implementation manner, wherein the temperature sensor arranged inside the monitoring sheet is specifically arranged on the surface of the battery material.

In the aspect and any possible implementation manner described above, an implementation manner is further provided, in which a/D converters are disposed in the voltage collection channel, the current collection channel, the light intensity collection channel, and the temperature collection channel, an input signal of the a/D converter is a collection signal of a corresponding channel, and an output end of the a/D converter is connected to the main control device.

In the above aspect and any possible implementation manner, an implementation manner is further provided, where the apparatus further includes a communication module, and the load module is in communication connection with the main control device through the communication module.

There is further provided in accordance with the above-described aspect and any possible implementation, an implementation in which the infrared temperature sensor is an active sensor.

The above-described aspects and any possible implementations further provide an implementation in which the monitoring patch is an active monitoring unit.

On the other hand, the utility model provides a solar wafer IV test system, characterized in that, the system includes master control equipment, wafer test equipment, as above any one be used for solar wafer IV test collection system and the wafer under test;

the battery piece to be tested is arranged in the inner cavity of the battery piece testing equipment;

the monitoring piece and the data acquisition equipment which are connected with the acquisition device for the solar cell IV test are arranged in the inner cavity of the cell test equipment;

the main control equipment is connected with the cell piece testing equipment and the collecting device for testing the solar cell piece IV.

Compared with the prior art, the utility model has the advantages of as follows or beneficial effect: the utility model adopts the modular design, and can be used in plug and play, thereby being more convenient for maintenance;

another technical scheme among the above-mentioned technical scheme has following advantage or beneficial effect: the utility model can calibrate the standard test condition illuminance (1000W/m < 2 >) and the test temperature (25 ℃) through the monitoring sheet, and ensure the accuracy and stability of the IV curve;

another technical scheme among the above-mentioned technical scheme has following advantage or beneficial effect: the utility model adopts 16-bit high-speed A/D and D/A converters, greatly shortens the measuring period, further improves the battery plate sorting efficiency, can adapt to the larger capacity demand, and has higher measuring precision;

another technical scheme in the above technical scheme has the following advantages or beneficial effects: the utility model discloses an electrical property of solar wafer can be measured in the scheme can be used to production and laboratory, can measure the IV curve data of 4 quadrants, including Q1 quadrant (bright field scanning), Q2 quadrant (dark field reverse scanning), Q3L quadrant (near zero point narrow range dark field scanning), Q3H quadrant (dark field scanning), reflect more comprehensively and be surveyed the electrical property of battery piece, more be favorable to the sorting of battery piece and provide the reference for the improvement of battery piece technology.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an overall structure of a drawer-type enclosure according to an embodiment of the present invention;

fig. 2 is a schematic block diagram of an acquisition device for testing a solar cell IV according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a monitoring sheet according to an embodiment of the present invention.

Wherein, in the figure:

1. a load power supply module; 2. an analog power supply module; 3. a load module; 4. monitoring the film; 5. a battery piece to be tested; 6. an infrared temperature sensor;

31. a load path; 32. a voltage acquisition channel; 33. a current collection channel; 34. a light intensity acquisition channel; 35. a temperature acquisition channel; 351. a monitoring piece temperature acquisition sub-channel; 352. an infrared temperature acquisition sub-channel;

41. a battery material; 42. a temperature sensor.

Detailed Description

For better understanding of the technical solutions of the present invention, the following detailed descriptions are provided with reference to the accompanying drawings.

It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. "first", "second" and "third" are merely descriptive references made for distinction. It should also be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The embodiment of the utility model provides an in a concrete implementation way, a collection system for solar wafer IV tests is as shown in figure 1, including quick-witted case, load power module 1, simulation power module 2 and load module 3.

The load power supply module 1, the simulation power supply module 2 and the load module 3 are structurally modularized, each module is of a drawer type structure, and drawer type shells of the modules are sequentially inserted into a standard 3U case, so that the modules can be plugged and used, and the maintenance and troubleshooting are convenient. A plate-shaped DIN416 12 connector is fixed inside the case to realize the connection among the modules in the case. The load power supply module is used for providing a linear power supply for a load channel of the load module of the device and ensuring the normal output of the load channel. The analog power supply module is used for providing a linear power supply for various electronic devices of the load module of the device, and the power supply ensures the measurement accuracy and stability of the load module. The load module is used for measuring the electrical performance parameters of the battery plate to be measured so as to generate an IV curve of four quadrants.

According to a specific implementation manner of the embodiment of the disclosure, the front panel of the chassis is provided with an LED lamp group capable of displaying the state of the device, and the rear panel is fixed with a connector used for realizing the connection of the device and the outside. The LED lamp group comprises 3 LED lamps used for displaying the working state of the load power supply module and 3 LED lamps used for displaying the working state of the analog power supply module.

According to a specific implementation manner of the embodiment of the disclosure, a 220V/12W alternating current fan is installed in the case, so that heat dissipation of the inside of the case is realized, and the testing device is ensured to be at a normal working temperature, namely, a constant temperature function is realized.

In the above embodiment, the load power supply module and the simulation power supply module are both connected with the 220V/50Hz alternating current power supply through the filtering IEC power supply interface, so as to realize the access of the 220V/50Hz alternating current power supply of the device. The filtering IEC power interface comprises a 2-pole fuse structure, and the 2-pole fuse is arranged in a 2-pole fuse seat, so that short circuit in the case can be prevented. The alternating current fan can be arranged in the load power supply module and connected with the IEC power supply interface to realize power supply, and a fan protective net is arranged on the outer side of the alternating current fan.

According to a specific implementation manner of the embodiment of the present disclosure, as shown in fig. 2, the load module includes a load channel 31, a current collecting channel 33, a voltage collecting channel 32, a light intensity collecting channel 34, and a temperature collecting channel 35. The five channels are all connected with a load power supply module, and the load power supply module provides power for the normal work of each channel. In five passageways, load channel 31 is used for being surveyed battery piece 5 and carries out forward or reverse voltage scanning, and voltage acquisition channel 32 is used for gathering the voltage signal of being surveyed battery piece 5, and current acquisition channel 33 is used for gathering the current signal of being surveyed battery piece 5, and light intensity acquisition channel 34 and temperature acquisition channel 35 are used for measuring light intensity and temperature signal, monitor and calibrate battery piece measuring environment.

In this embodiment, the voltage acquisition channel 32, the current acquisition channel 33, and the light intensity acquisition channel 34 all adopt a 16-bit high-speed a/D converter to convert the analog signals acquired by them, so as to obtain digital signals adapted to the main control module. The input ends of the A/D converters of the voltage acquisition channel 32 and the current acquisition channel 33 are connected with the battery sheet 5 to be detected through circuits, and the output ends of the A/D converters are connected with the main control module. The voltage measurement range of the voltage acquisition channel comprises: 20V, + -10V, + -4V, + -2V, + -1V. The current measurement range of the current collection channel comprises a high range +/-20A, +/-10A, +/-4A, +/-2A and a low range +/-1A, +/-0.5A, +/-0.2A, +/-0.1A, and has a larger current measurement range, so that more types of solar cells can be compatible. The light intensity collecting channel 34 is connected with the monitoring sheet 4, collects the light intensity feedback signal of the monitoring sheet 4, converts the light intensity feedback signal by the A/D converter, transmits the light intensity feedback signal to the main control module for processing, analyzing and judging, and then the main control module carries out illumination adjustment on the light-emitting device, so that the calibration of the standard test condition illumination intensity (1000W/m < 2 >) is realized. The monitoring sheet 4 is an active monitoring unit, is arranged near the battery sheet 5 to be detected, is connected with the analog power supply module and is powered by the analog power supply module. The load channel 31 is provided with 12V positive voltage and-18V negative voltage by a load power supply module, the load module enables the load channel 31 to output forward or reverse voltage through a 16-bit high-speed D/A converter, the range is-18V- +12V, the load channel 31 is connected with the positive electrode and the negative electrode of the battery plate 5 to be detected through cables, then the battery plate to be detected is scanned forward or reversely, meanwhile, the voltage acquisition channel 32 and the current acquisition channel 33 acquire voltage and current, and further the series resistance (Rser) and the parallel resistance (Rshunt) can be calculated. The temperature acquisition channel 35 includes two sub-channels, a monitor chip temperature acquisition sub-channel 351 and an infrared temperature acquisition sub-channel 352, and acquires the ambient temperature in two channels. The monitoring piece temperature acquisition sub-channel 351 connects the load module with the temperature sensor 42 (PT 100 temperature sensor) inside the monitoring piece 4 by a three-wire system connection method through a circular industrial connection wire, acquires temperature data inside the monitoring piece, and the measurable temperature range is 0-60 ℃. The infrared temperature acquisition sub-channel connects the infrared temperature sensor 6 arranged near the battery plate to be detected with the load module through a round industrial connecting wire, so as to realize the acquisition of infrared temperature. The infrared temperature sensor 6 reads the temperature of the surface of the battery piece 5 to be measured in a non-contact measuring mode, the measurable temperature range is-20 ℃ to 150 ℃, and the resolution is less than 0.3 ℃. The load module transmits the collected monitoring sheet temperature and infrared temperature to the main control module for processing, analysis and judgment, and the main control module issues a command to adjust the environmental temperature of the battery sheet to be detected. The environmental temperature adjusting device and the layout mode do not belong to the device disclosed in the present disclosure, and the environmental setting of the existing monitoring sheet to be tested is referred to, which is not described herein again. The temperature acquisition channel 35 is provided with a 16-bit multi-channel A/D converter, and converts the acquired temperature signals and then transmits the converted temperature signals to the main control module.

The load module measures voltage and current by adopting a four-wire system measuring method, in the four-wire system, the battery piece 5 to be measured is connected with four cables in common, wherein two cables are used for collecting voltage signals, and two cables are used for collecting current signals, so that voltage and current collecting channels can be separated, and further measuring errors caused by wires and contact resistance are reduced. The voltage and current signal cables are connected into the load module through a 7W2 hybrid contact D-SUB connector on the panel, and the current contact of the connector can carry the current of 40A. Voltage, electric current access cable reach the connector is kept apart through the shielded wire, can avoid interfering, guarantees the accuracy. If the voltage and current access cable is connected, the load module can receive a signal that the cable is connected.

According to a specific implementation manner of the embodiment of the present disclosure, the testing apparatus further includes a communication module, the communication module is an internet access communication module and/or a wireless communication module, the load module is connected to a PC system through the communication module, and the PC system is a main control module, so as to implement a main control function.

In the above embodiment, the load module connects the light intensity signal output by the monitoring sheet into the load module and provides power for the monitoring sheet through the multi-core circular industrial connecting wire.

Furthermore, since the light intensity signal of the monitoring sheet 4 is collected to evaluate the light intensity of the environment of the cell sheet to be measured, in order to reduce the spectral deviation, the same cell material 41 as the cell sheet 5 to be measured is provided on the monitoring sheet 4, as shown in fig. 3, and the cell material is laid on the monitoring sheet, and a temperature sensor 42 is provided on the cell material. The load module is connected with the battery material 41 through a circular industrial connecting wire, and collects an electric signal of reaction light intensity.

As a specific implementation manner, in the above embodiment, the infrared temperature sensor 6 is an active sensor, a power end of the active sensor is connected to the analog power supply module, and an output end of the active sensor outputs a current of 4 to 20 mA.

The load channel 31 has a temperature detection unit and a current detection unit for detecting the temperature in the load channel and the current value of the main circuit of the load channel, and when the internal temperature is too high or the current value is greater than a threshold value, the load channel is turned off, thereby protecting the load channel from being damaged.

The above description of the embodiments is only for the purpose of helping to understand the method of the present application and its core ideas; meanwhile, for a person skilled in the art, according to the idea of the present application, the specific implementation manner and the application scope may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The acquisition device for the solar cell IV test is characterized by comprising a case, a load power module, a simulation power module and a load module;

the load module is in communication connection with the main control device.

2. The collecting device for the solar cell IV test as claimed in claim 1, wherein the load module comprises a load channel for performing voltage scanning on the tested cell, a voltage collecting channel for collecting the voltage signal of the tested cell, a current collecting channel for collecting the current signal of the tested cell, a light intensity collecting channel for collecting the light intensity of the environment of the tested cell and a temperature collecting channel for collecting the environment temperature of the tested cell;

the light intensity acquisition channel is connected with the monitoring sheet;

the temperature acquisition channel is connected with the temperature sensor.

3. The acquisition device for the solar cell piece IV test of claim 2, wherein the temperature sensor comprises a temperature sensor arranged inside the monitoring piece and an infrared temperature sensor used for acquiring the surface temperature of the solar cell piece to be tested.

4. The collecting device for the solar cell IV test is characterized in that the monitoring sheet is arranged near the tested cell.

5. The acquisition device for the solar cell IV test is characterized in that a battery material which is the same as the battery piece to be tested is flatly arranged in the monitoring piece and is connected with the light intensity acquisition channel.

6. The collecting device for the solar cell piece IV test as claimed in claim 5, wherein a temperature sensor arranged inside the monitoring piece is arranged on the surface of the cell material.

7. The collecting device for the solar cell IV test as claimed in claim 2, wherein A/D converters are respectively arranged in the voltage collecting channel, the current collecting channel, the light intensity collecting channel and the temperature collecting channel, the input signals of the A/D converters are the collecting signals of the corresponding channels, and the output ends of the A/D converters are connected with the main control equipment.

8. The collecting device for the solar cell piece IV test is characterized by further comprising a communication module, wherein the load module is in communication connection with the main control equipment through the communication module.

9. The collecting device for the solar cell piece IV test as claimed in claim 3, wherein the infrared temperature sensor is an active sensor, and the monitoring piece is an active monitoring unit.

10. A solar cell IV test system is characterized by comprising a main control device, a cell test device, the acquisition device for the solar cell IV test as claimed in any one of claims 1 to 9, and a cell to be tested;

the main control equipment is connected with the cell piece testing equipment and the acquisition device for testing the solar cell piece IV.