Efficiency detection device for photovoltaic cell

Abstract

The utility model discloses an efficiency detection device of a photovoltaic cell, the efficiency detection device of the photovoltaic cell comprises a crystalline silicon standard sheet, a processing unit and a display unit, and the crystalline silicon standard sheet comprises a crystalline silicon optical signal input end and a crystalline silicon electric signal output end. The processing unit comprises a crystalline silicon electric signal input end, a photovoltaic area input end, a positive electrode signal input end, a negative electrode signal input end and a photoelectric efficiency output end; the crystalline silicon electric signal input end is electrically connected with the crystalline silicon electric signal output end, the photovoltaic area input end is electrically connected with the photovoltaic area providing end of the efficiency detection device, the positive electrode signal input end is electrically connected with the positive electrode signal detection end of the efficiency detection device, and the negative electrode signal input end is electrically connected with the negative electrode signal detection end of the efficiency detection device. The display unit comprises a display input end, and the photoelectric efficiency output end is electrically connected with the display input end. The positive electrode signal detection end is electrically connected with the positive electrode of the to-be-detected photovoltaic cell, and the negative electrode signal detection end is electrically connected with the negative electrode of the to-be-detected photovoltaic cell.

Description

Technical Field

[0001] The utility model relates to the technical field of battery monitoring, in particular to an efficiency detection device for a photovoltaic cell. Background Art

[0002] As a renewable energy source, solar energy is clean, pollution-free and environmentally friendly, making it widely used in power systems and other fields. Currently, the use of photovoltaic equipment to convert solar energy into electrical energy has become one of the main applications of solar energy.

[0003] Currently, light intensity is primarily measured using photoelectric sensors. However, due to the low precision of these sensors in detecting light intensity, the calculated photoelectric conversion efficiency is inaccurate. Therefore, obtaining accurate light intensity to improve the accuracy of photoelectric conversion efficiency calculations has become a pressing technical issue. Utility Model Content

[0004] The utility model provides an efficiency detection device for photovoltaic cells, which can improve the acquisition accuracy of light intensity, thereby improving the reliability and accuracy of the efficiency detection device in calculating the photoelectric conversion efficiency.

[0005] The utility model provides a photovoltaic cell efficiency detection device, comprising:

[0006] A crystalline silicon standard wafer, comprising a crystalline silicon optical signal input terminal and a crystalline silicon electrical signal output terminal;

[0007] The processing unit includes a crystalline silicon electrical signal input terminal, a photovoltaic area input terminal, a positive signal input terminal, a negative signal input terminal, and a photoelectric efficiency output terminal; the crystalline silicon electrical signal input terminal is electrically connected to the crystalline silicon electrical signal output terminal, the photovoltaic area input terminal is electrically connected to the photovoltaic area providing terminal of the efficiency detection device, the positive signal input terminal is electrically connected to the positive signal detection terminal of the efficiency detection device, and the negative signal input terminal is electrically connected to the negative signal detection terminal of the efficiency detection device;

[0008] The display unit comprises a display input terminal, the photoelectric efficiency output terminal being electrically connected to the display input terminal;

[0009] The positive signal detection terminal is electrically connected to the positive electrode of the photovoltaic cell to be tested, and the negative signal detection terminal is electrically connected to the negative electrode of the photovoltaic cell to be tested.

[0010] Optionally, the processing unit includes a current conversion circuit and a voltage conversion circuit;

[0011] The current conversion circuit includes a positive current input terminal and a negative current input terminal, the positive current input terminal is electrically connected to the positive signal detection terminal, and the negative current input terminal is electrically connected to the negative signal detection terminal;

[0012] The voltage conversion circuit includes a positive voltage input terminal and a negative voltage input terminal. The positive voltage input terminal is electrically connected to the positive signal detection terminal, and the negative voltage input terminal is electrically connected to the negative signal detection terminal.

[0013] Optionally, the processing unit further includes a controller;

[0014] The controller is electrically connected to the crystalline silicon wafer, the current conversion circuit, the voltage conversion circuit and the photovoltaic area providing terminal respectively.

[0015] Optionally, the efficiency detection device further includes a first analog-to-digital conversion structure and a second analog-to-digital conversion structure;

[0016] The first analog-to-digital conversion structure is electrically connected to the controller and the current conversion circuit respectively;

[0017] The second analog-to-digital conversion structure is electrically connected to the controller and the voltage conversion circuit respectively.

[0018] Optionally, the efficiency detection device further includes a third analog-to-digital conversion structure;

[0019] The third analog-to-digital conversion structure is electrically connected to the controller and the crystalline silicon wafer respectively.

[0020] Optionally, the efficiency detection device further includes a power supply unit;

[0021] The power supply end of the power supply unit is electrically connected to the power supply input end of the processing unit and the power supply end of the display unit respectively.

[0022] Optionally, the crystalline silicon wafer is reused as the power supply unit.

[0023] Optionally, the crystalline silicon wafer includes a crystalline silicon cell.

[0024] The display unit includes a display panel.

[0025] Optionally, the efficiency detection device further includes a key input unit;

[0026] The key input unit includes a plurality of key input terminals and the photovoltaic area providing terminal electrically connected to each of the key input terminals.

[0027] The technical solution of the present invention is to set a positive signal detection terminal and a negative signal detection terminal so that the processing unit can obtain the voltage signal and current signal of the photovoltaic cell to be tested, set a photovoltaic area providing terminal so that the processing unit can obtain the light absorption area of the photovoltaic cell to be tested, and set a display unit so that the photoelectric conversion efficiency calculated by the processing unit can be displayed on the display unit for easy observation by the test personnel. By setting a crystalline silicon wafer in the efficiency detection device, the light intensity currently received by the photovoltaic cell to be tested can be obtained through the crystalline silicon wafer, and the crystalline silicon wafer has high photoelectric conversion efficiency and sensitivity, so as to improve the accuracy and reliability of the efficiency detection device in obtaining the light intensity, thereby improving the calculation reliability of the photoelectric conversion efficiency, improving the detection efficiency of the efficiency detection device, and at the same time reducing the overall structure of the efficiency detection device, thereby improving the ease of use of the efficiency detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, although the drawings described below are some specific embodiments of the present invention, for those skilled in the art, the basic concepts of the device structure, driving method and manufacturing method disclosed and suggested by the various embodiments of the present invention can be expanded and extended to other structures and drawings. Undoubtedly, these should all be within the scope of the claims of the present invention.

[0029] Figure 1 A schematic structural diagram of a photovoltaic cell efficiency detection device provided by an embodiment of the present utility model;

[0030] Figure 2 A schematic structural diagram of another photovoltaic cell efficiency detection device provided by an embodiment of the present utility model;

[0031] Figure 3 A schematic structural diagram of another photovoltaic cell efficiency detection device provided by an embodiment of the present utility model;

[0032] Figure 4 A schematic structural diagram of another photovoltaic cell efficiency detection device provided by an embodiment of the present utility model;

[0033] Figure 5 A schematic structural diagram of a photovoltaic cell efficiency detection device provided in an embodiment of the present utility model. DETAILED DESCRIPTION

[0034] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will refer to the accompanying drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the present invention through implementation methods. Obviously, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the basic concepts disclosed and suggested by the embodiments of the present invention, all other embodiments obtained by those skilled in the art are within the scope of protection of the present invention.

[0035] Figure 1 A schematic diagram of a photovoltaic cell efficiency detection device provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, a photovoltaic cell efficiency detection device 100 includes a crystalline silicon wafer 10, a processing unit 20, and a display unit 50. The crystalline silicon wafer 10 includes a crystalline silicon optical signal input terminal 11 and a crystalline silicon electrical signal output terminal a1. The processing unit 20 includes a crystalline silicon electrical signal input terminal a2, a photovoltaic area input terminal, a positive signal input terminal, a negative signal input terminal, and a photoelectric efficiency output terminal b2. The crystalline silicon electrical signal input terminal a2 is electrically connected to the crystalline silicon electrical signal output terminal a1, the photovoltaic area input terminal is electrically connected to the photovoltaic area providing terminal 41 of the efficiency detection device 100, the positive signal input terminal is electrically connected to the positive signal detection terminal 31 of the efficiency detection device 100, and the negative signal input terminal is electrically connected to the negative signal detection terminal 32 of the efficiency detection device 100. The display unit 50 includes a display input terminal b1, and the photoelectric efficiency output terminal b2 is electrically connected to the display input terminal b1.

[0036] Among them, the positive signal detection terminal 31 is electrically connected to the positive electrode of the photovoltaic cell to be tested, and the negative signal detection terminal 32 is electrically connected to the negative electrode of the photovoltaic cell PV to be tested. The photovoltaic cell to be tested includes a perovskite solar cell or a multi-compound thin-film solar cell, etc. The photovoltaic cell to be tested can convert the absorbed light energy into electrical energy for use by other devices. In an optional embodiment, the crystalline silicon label 10 includes a crystalline silicon cell, and the crystalline silicon light signal input terminal 11 of the crystalline silicon cell is an entire light receiving plane. After the light beam is irradiated onto the light receiving plane, the crystalline silicon cell converts the received light signal into an electrical signal through the photoelectric conversion film layer in contact with the light receiving plane. The crystalline silicon cell has high photoelectric conversion efficiency, good stability, long service life, and low cost, which can improve the service life and detection reliability of the efficiency detection device. Optionally, the display unit 50 includes a display panel to display data through the display panel. The display panel includes a liquid crystal display panel, an organic light emitting diode display panel, or a micro light emitting diode display panel, etc., which can be selected according to actual needs.

[0037] Specifically, the photoelectric conversion efficiency of the photovoltaic cell to be tested is related to the current voltage, current current, light absorption area and current light intensity of the photovoltaic cell to be tested. The positive signal detection terminal 31 of the efficiency detection device 100 is electrically connected to the positive pole of the photovoltaic cell to be tested, and the negative signal detection terminal 32 of the efficiency detection device 100 is electrically connected to the negative pole of the photovoltaic cell to be tested to obtain the current voltage and current current flowing through the photovoltaic cell to be tested. The photovoltaic area providing terminal 41 can provide the light absorption area of the photovoltaic cell to be tested. The crystalline silicon wafer 10 has good photoelectric conversion efficiency and sensitivity, so the crystalline silicon wafer 10 is used to obtain the light intensity obtained by the current photovoltaic cell to be tested at the current moment, so as to improve the detection accuracy of the current light intensity, thereby improving the calculation accuracy and reliability of the photoelectric conversion efficiency. The crystalline silicon standard wafer 10 converts the currently captured light intensity into an electrical signal, including a current signal or a voltage signal. The processing unit 20 obtains the converted electrical signal from the crystalline silicon standard wafer 10 via the crystalline silicon electrical signal input terminal a2 and the crystalline silicon electrical signal output terminal a1. The processing unit 20 amplifies the converted electrical signal and then determines the light intensity corresponding to the currently converted electrical signal. The processing unit 20 obtains the voltage and current signals flowing through the photovoltaic cell under test via the positive signal detection terminal 31 and the negative signal detection terminal 32. The processing unit 20 obtains the light absorption area of the photovoltaic cell under test via the photovoltaic area providing terminal 41. The processing unit 20 calculates the acquired light absorption area, light intensity, voltage signal, and current signal according to a preset calculation logic to obtain the photoelectric conversion efficiency of the photovoltaic cell under test. The calculated photoelectric conversion efficiency is then transmitted to the display unit 50 via the photoelectric efficiency output terminal b2 and the display input terminal b1. The display unit 50 displays the obtained photoelectric conversion efficiency, making it easier for testers to intuitively obtain the measured photoelectric conversion efficiency. In addition, since the structure of the crystalline silicon wafer 10 is relatively small, the use of the crystalline silicon wafer can improve the real-time performance of obtaining the light intensity signal, improve the detection efficiency of the photoelectric conversion efficiency, and at the same time reduce the overall structure of the efficiency detection device, thereby improving the ease of use of the efficiency detection device.

[0038] The technical solution provided by the present invention is to set a positive signal detection terminal and a negative signal detection terminal so that the processing unit can obtain the voltage signal and current signal of the photovoltaic cell to be tested, set a photovoltaic area providing terminal so that the processing unit can obtain the light absorption area of the photovoltaic cell to be tested, and set a display unit so that the photoelectric conversion efficiency calculated by the processing unit can be displayed on the display unit for easy observation by the test personnel. By setting a crystalline silicon wafer in the efficiency detection device, the light intensity currently received by the photovoltaic cell to be tested can be obtained through the crystalline silicon wafer, and the crystalline silicon wafer has high photoelectric conversion efficiency and sensitivity, so as to improve the accuracy and reliability of the efficiency detection device in obtaining the light intensity, thereby improving the calculation reliability and accuracy of the photoelectric conversion efficiency, and improving the detection efficiency of the efficiency detection device, while reducing the overall structure of the efficiency detection device and improving the ease of use of the efficiency detection device.

[0039] Optional, Figure 2 A schematic diagram of another photovoltaic cell efficiency detection device provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the processing unit 20 includes a current conversion circuit 21 and a voltage conversion circuit 22. The current conversion circuit 21 includes a positive current input terminal and a negative current input terminal. The positive current input terminal is electrically connected to the positive signal detection terminal 31, and the negative current input terminal is electrically connected to the negative signal detection terminal 32. The voltage conversion circuit 22 includes a positive voltage input terminal and a negative voltage input terminal. The positive voltage input terminal is electrically connected to the positive signal detection terminal 31, and the negative voltage input terminal is electrically connected to the negative signal detection terminal 32.

[0040] Among them, the current conversion circuit 21 is used to convert the electrical signal between the positive signal detection terminal 31 and the negative signal detection terminal 32 into a current signal, and the voltage conversion circuit 22 is used to convert the electrical signal between the positive signal detection terminal 31 and the negative signal detection terminal 32 into a voltage signal.

[0041] Specifically, the current conversion circuit 21 may include components such as diodes, resistors, and capacitors, and the voltage conversion circuit 22 may include components such as resistors and capacitors. The present embodiment of the utility model does not limit the specific structures of the current conversion circuit 21 and the voltage conversion circuit 22, provided that the current conversion circuit 21 can convert the acquired electrical signal into a current signal and the voltage conversion circuit 22 can convert the acquired electrical signal into a voltage signal. In an optional embodiment, the details of the current conversion circuit 21 and the voltage conversion circuit 22 can refer to the voltage detection circuit and current detection circuit in a multimeter.

[0042] Optional, reference Figure 2 The processing unit 20 further includes a controller 23 ; the controller 23 is electrically connected to the crystalline silicon wafer 10 , the current conversion circuit 21 , the voltage conversion circuit 22 and the photovoltaic area providing terminal 41 .

[0043] Specifically, the controller 23 may pre-store a data table of the current and light intensity of the crystalline silicon wafer 10. The pre-stored corresponding data table may be measured in advance. The crystalline silicon wafer 10 is placed in a light box, and a solar simulator is used to provide a light beam of preset light intensity to the crystalline silicon wafer 10, and a current signal is obtained when the crystalline silicon wafer 10 converts the light signal into an electrical signal under the preset light intensity. The current signal and the preset light intensity are used as a set of corresponding data, and the preset light intensity provided by the solar simulator is adjusted to obtain current signals corresponding to different light intensities. The obtained multiple sets of corresponding data of current signals and preset light intensities are stored in the controller 23, so that the controller 23 can subsequently reversely infer the light intensity currently obtained by the crystalline silicon wafer 10 based on the current signal converted by the crystalline silicon wafer 10. That is, after the controller 23 obtains the current signal converted by the crystalline silicon wafer 10, it can determine the light intensity corresponding to the currently obtained current signal based on the stored corresponding data table, so as to improve the accuracy and reliability of the determination of the light intensity. For example, Table 1 shows the corresponding data of some current signals stored in the controller 23 and the preset light intensity. If the current signal currently converted by the crystalline silicon wafer 10 is 0.1578A, referring to Table 1, it is determined that the light intensity currently obtained by the crystalline silicon wafer 10 is 1000W / cm 2 After the controller 23 obtains the current signal provided by the current conversion circuit 21, the voltage signal provided by the voltage conversion circuit 22, and the light receiving area provided by the photovoltaic area providing terminal 41, the controller 23 can calculate the photoelectric conversion efficiency according to the internal photoelectric conversion efficiency calculation logic, thereby improving the calculation accuracy of the photoelectric conversion efficiency.

[0044] Table 1

[0045]

[0046]

[0047] It can be understood that the operation logic of the controller 23 can be determined according to the calculation formula of the photoelectric conversion efficiency. For example, the controller 23 converts the current signal of the crystalline silicon wafer 10 into a light intensity of L, the current signal of the photovoltaic cell to be tested detected by the current conversion circuit 21 is I, the voltage signal of the photovoltaic cell to be tested detected by the voltage conversion circuit 22 is U, the light receiving area provided by the photovoltaic area providing terminal 41 is S, and the photoelectric conversion efficiency λ = U*I / (L*S).

[0048] Optional, continue to refer to Figure 2The efficiency detection device 100 also includes a first analog-to-digital conversion structure 01 and a second analog-to-digital conversion structure 02; the first analog-to-digital conversion structure 01 is electrically connected to the controller 23 and the current conversion circuit 21 respectively; the second analog-to-digital conversion structure 02 is electrically connected to the controller 23 and the voltage conversion circuit 22 respectively.

[0049] Among them, the analog-to-digital conversion structure is used to convert analog signals into digital signals.

[0050] Specifically, by providing a first analog-to-digital conversion structure 01 between the controller 23 and the current conversion circuit 21, the analog current signal provided by the current conversion circuit 21 is converted into a digital current signal by the first analog-to-digital conversion structure 01, thereby improving the transmission efficiency and accuracy of the digital current signal to the controller 23, facilitating the controller 23 to perform precise digital calculations, and improving the calculation accuracy and reliability. By providing a second analog-to-digital conversion structure 02 between the controller 23 and the voltage conversion circuit 22, the analog voltage signal provided by the voltage conversion circuit 22 is converted into a digital voltage signal by the second analog-to-digital conversion structure 02, thereby improving the transmission efficiency and accuracy of the digital voltage signal to the controller 23, facilitating the controller 23 to perform precise digital calculations, and improving the calculation accuracy and reliability.

[0051] Optional, Figure 3 A schematic diagram of the structure of another photovoltaic cell efficiency detection device provided by the embodiment of the present utility model is shown as follows: Figure 3 As shown, the efficiency detection device 100 further includes a third analog-to-digital conversion structure 03; the third analog-to-digital conversion structure 03 is electrically connected to the controller 23 and the crystalline silicon wafer 10. Thus, by providing the third analog-to-digital conversion structure 03 between the controller 23 and the crystalline silicon wafer 10, the third analog-to-digital conversion structure 03 converts the analog current signal provided by the crystalline silicon wafer 10 into a digital current signal, thereby improving the transmission efficiency and accuracy of the digital current signal to the controller 23, facilitating the controller 23 to perform precise digital calculations, and improving the accuracy and reliability of the calculations.

[0052] Optional, Figure 4 A schematic diagram of the structure of another photovoltaic cell efficiency detection device provided by the embodiment of the present utility model is shown as follows: Figure 4 As shown, the efficiency detection device 100 further includes a power supply unit 60 ; a power supply terminal of the power supply unit 60 is electrically connected to the power supply input terminal g of the processing unit 20 and the power supply terminal of the display unit 50 .

[0053] The power supply unit 60 includes a battery pack, etc., and can be configured according to actual needs, which is not specifically limited here.

[0054] Specifically, a power supply unit 60 is provided to provide the processing unit 20 with the required electrical energy, thereby ensuring the normal operation of the processing unit 20. The power supply terminal of the power supply unit 60 is electrically connected to the power supply terminal of the display unit 50, so that the power supply unit 60 can provide a power supply signal to the display unit 50, so that the display unit 50 can display the photoelectric conversion efficiency transmitted by the processing unit 20 for observation by the inspection personnel.

[0055] Optional, Figure 5 A schematic diagram of a photovoltaic cell efficiency detection device provided by an embodiment of the present invention is shown in FIG. Figure 5 As shown, the crystalline silicon wafer 10 is multiplexed into the power supply unit 60. In this way, after the crystalline silicon wafer 10 converts the optical signal into an electrical signal, the converted electrical signal can not only be used to determine the current light intensity, but also provide a power supply signal to the processing unit 20 and the display unit 50, thereby improving energy utilization. At the same time, the overall structure of the efficiency detection device is reduced, making the structure of the efficiency detection device more compact and improving the ease of use of the efficiency detection device.

[0056] Optional, reference Figure 5 The efficiency detection device 100 further includes a key input unit 40 ; the key input unit 40 includes a plurality of key input terminals 42 and a photovoltaic area providing terminal 41 electrically connected to each key input terminal.

[0057] The number of the key input terminals 42 can be set according to actual needs. For example, the key input unit 40 includes 9 key input terminals 42. The number can also be other, which is not specifically limited here.

[0058] Specifically, by providing the key input unit 40 , the inspector can input the light receiving area of the photovoltaic cell to be tested through multiple key input terminals 42 , thereby improving the convenience of use. Figure 5Only the key that provides a digital signal to the processing unit 20 through the key input terminal 42 and the photovoltaic area providing terminal 41 is shown. In another optional embodiment, the key input terminal 42 includes a shutdown key input terminal, a confirmation key input terminal, and a cancel key input terminal. The shutdown key input terminal is used to control the efficiency detection device 100 to shut down. After pressing the confirmation key input terminal, the processing unit 20 uses the currently input value as the light receiving area to calculate the photoelectric conversion efficiency. The cancel key input terminal is used to clear the currently input value, which is convenient for re-entering the correct light receiving area when the input light receiving area is incorrect, and is convenient for correcting the incorrect value, thereby improving the accuracy and reliability of the light receiving area. When the photovoltaic cell to be tested is prepared, the light receiving area of the photovoltaic cell to be tested is a fixed value. The tester can obtain the light receiving area from the nameplate of the photovoltaic cell to be tested and provide the light receiving area to the processing unit 20 through the key input terminal 42 for subsequent calculation. By setting the key input unit 40, when testing photovoltaic cells with different light receiving areas, it is convenient for the tester to input different light receiving areas, thereby improving the convenience of use and being easy to carry.

[0059] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, combinations, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A photovoltaic cell efficiency detection device, characterized in that: include: The crystalline silicon standard wafer includes a crystalline silicon optical signal input terminal and a crystalline silicon electrical signal output terminal; The processing unit includes a crystalline silicon electrical signal input terminal, a photovoltaic area input terminal, a positive signal input terminal, a negative signal input terminal, and a photoelectric efficiency output terminal; the crystalline silicon electrical signal input terminal is electrically connected to the crystalline silicon electrical signal output terminal, the photovoltaic area input terminal is electrically connected to the photovoltaic area providing terminal of the efficiency detection device, the positive signal input terminal is electrically connected to the positive signal detection terminal of the efficiency detection device, and the negative signal input terminal is electrically connected to the negative signal detection terminal of the efficiency detection device; The display unit comprises a display input terminal, the photoelectric efficiency output terminal being electrically connected to the display input terminal; The positive signal detection terminal is electrically connected to the positive electrode of the photovoltaic cell to be tested, and the negative signal detection terminal is electrically connected to the negative electrode of the photovoltaic cell to be tested.

2. The efficiency detection device according to claim 1, characterized in that: The processing unit includes: a current conversion circuit and a voltage conversion circuit; The current conversion circuit includes a positive current input terminal and a negative current input terminal, the positive current input terminal is electrically connected to the positive signal detection terminal, and the negative current input terminal is electrically connected to the negative signal detection terminal; The voltage conversion circuit includes a positive voltage input terminal and a negative voltage input terminal. The positive voltage input terminal is electrically connected to the positive signal detection terminal, and the negative voltage input terminal is electrically connected to the negative signal detection terminal.

3. The efficiency detection device according to claim 2, characterized in that: The processing unit further includes a controller; The controller is electrically connected to the crystalline silicon wafer, the current conversion circuit, the voltage conversion circuit and the photovoltaic area providing terminal respectively.

4. The efficiency detection device according to claim 3, characterized in that: Also includes: a first analog-to-digital conversion structure and a second analog-to-digital conversion structure; The first analog-to-digital conversion structure is electrically connected to the controller and the current conversion circuit respectively; The second analog-to-digital conversion structure is electrically connected to the controller and the voltage conversion circuit respectively.

5. The efficiency detection device according to claim 3, characterized in that: Also includes: a third analog-to-digital conversion structure; The third analog-to-digital conversion structure is electrically connected to the controller and the crystalline silicon wafer respectively.

6. The efficiency detection device according to claim 1, characterized in that: Also includes: Power supply unit; The power supply end of the power supply unit is electrically connected to the power supply input end of the processing unit and the power supply end of the display unit respectively.

7. The efficiency detection device according to claim 6, characterized in that: The crystalline silicon wafer is reused as the power supply unit.

8. The efficiency detection device according to claim 1, characterized in that: The crystalline silicon wafer includes a crystalline silicon cell.

9. The efficiency detection device according to claim 1, characterized in that: The display unit includes a display panel.

10. The efficiency detection device according to claim 1, characterized in that: Also includes: Key input unit; The key input unit includes a plurality of key input terminals and the photovoltaic area providing terminal electrically connected to each of the key input terminals.

Images