A system and method for measuring spectral responsivity of photovoltaic modules

Abstract

The present invention provides a spectral responsivity measurement system and method for a photovoltaic module, and relates to the technical field of photoelectric element testing. The spectral responsivity measurement system of the photovoltaic module includes: a monochromatic light generator is used to provide monochromatic light to a test cell of the photovoltaic module, and the monochromatic light has a preset frequency and a preset wavelength; an auxiliary light generator is used to provide auxiliary light to a non-test cell unit, and the non-test cell unit and the test cell form a test series string of the photovoltaic module; wherein the current of the non-test cell unit under the auxiliary light of the auxiliary light generator is greater than the current of the test cell unit under the monochromatic light of the monochromatic light generator; a shading component is used to shield the cell units outside the test series string of the photovoltaic module; a signal acquisition module is used to be electrically connected to the photovoltaic module to receive an electrical signal generated by the test cell unit, and the electrical signal is used to determine the spectral responsivity of the test cell unit.

Description

Technical Field

[0001] The present invention relates to the technical field of photoelectric component testing, and in particular to a spectral responsivity measurement system and method for a photovoltaic module. Background Art

[0002] With the rapid economic development and the increasing exhaustion of traditional energy, new energy industries represented by solar photovoltaic power generation and wind power generation are attracting great attention. Photovoltaic modules are the carriers of power station design applications and foreign export trade. Their maximum output power value is the most important parameter for accurate evaluation of photovoltaic power station power generation and the settlement unit for foreign export trade. The accurate measurement of key optoelectronic performance parameters such as the maximum power of photovoltaic modules is the most concerned issue in the photovoltaic industry. When the actual spectral responsivity of photovoltaic modules differs greatly from the designed spectral responsivity, measurement deviation will be introduced, affecting the accuracy of the measurement results of the optoelectronic performance parameters of photovoltaic modules.

[0003] Photovoltaic modules generally include encapsulation glass, EVA film, multiple photovoltaic cells and backplanes, which are obtained after lamination. Therefore, when sampling and testing a single cell of a photovoltaic module to measure the spectral responsivity of a single cell of the photovoltaic module, it is generally necessary to cut the photovoltaic module to obtain a single cell of the photovoltaic module, which will damage the photovoltaic module to be tested. Summary of the invention

[0004] The present invention provides a spectral responsivity measurement system and method for a photovoltaic module, which are used to solve the defect in the prior art that a photovoltaic module is cut to obtain a single cell to measure the spectral responsivity of a single cell of a photovoltaic module, and achieve the measurement of the spectral responsivity of a single cell of a photovoltaic module without cutting the photovoltaic module.

[0005] The invention provides a spectral responsivity measurement system for a photovoltaic module, comprising: a monochromatic light generator, an auxiliary light generator, a shading component and a signal acquisition module.

[0006] The monochromatic light generator is used to provide monochromatic light to the test battery unit of the photovoltaic assembly, and the monochromatic light has a preset frequency and a preset wavelength.

[0007] The auxiliary light generator is used to provide auxiliary light to the non-test battery unit, and the non-test battery unit and the test battery constitute a test series assembly string of the photovoltaic assembly; wherein the current of the non-test battery unit under the auxiliary light of the auxiliary light generator is greater than the current of the test battery unit under the monochromatic light of the monochromatic light generator.

[0008] The shading assembly is used to shield the battery cells outside the test series assembly string of the photovoltaic assembly.

[0009] The signal acquisition module is used to be electrically connected to the photovoltaic assembly to receive the electrical signal generated by the test battery unit of the photovoltaic assembly, and the electrical signal is used to determine the spectral responsivity of the test battery unit.

[0010] According to a spectral responsivity measurement system of a photovoltaic component provided by the present invention, the monochromatic light generator includes a plurality of sub-monochromatic light generators, the preset frequency of the monochromatic light generated by each sub-monochromatic light generator is different, and the preset wavelength of the monochromatic light generated by each sub-monochromatic light generator is different.

[0011] A spectral responsivity measurement system for a photovoltaic module provided according to the present invention further comprises a simulated sunlight generator, wherein the simulated sunlight generator is used to provide simulated sunlight to the test battery unit.

[0012] A spectral responsivity measurement system for a photovoltaic component provided according to the present invention also includes a light mixing component, which is used to receive the output light of the multiple sub-monochromatic light generators, and mix the received light and transmit it to the test battery unit; or the light mixing component is used to receive the output light of the multiple sub-monochromatic light generators and the simulated sunlight, and mix the received light and output it to the test battery unit.

[0013] A spectral responsivity measurement system for a photovoltaic module provided according to the present invention further includes a spectroscopic component, which is used to receive the light output by the light mixing component and transmit the received light to the test cell unit and the standard photovoltaic cell module respectively.

[0014] A photovoltaic module spectral responsivity measurement system provided by the present invention further includes a first bias component and a second bias component.

[0015] The first bias component is electrically connected to the photovoltaic component, and is used to adjust the terminal voltage of the test battery unit to zero, wherein the terminal voltage of the test battery unit includes the voltage generated by the test battery unit under the irradiation of simulated sunlight from the simulated sunlight generator, the voltage generated by the test battery unit under the irradiation of monochromatic light from the monochromatic light generator, and the voltage generated by the non-test battery unit under the irradiation of auxiliary light from the auxiliary light generator.

[0016] The second bias assembly is electrically connected to the standard photovoltaic cell assembly and is used to adjust the road terminal voltage of the standard photovoltaic cell assembly to zero. The road terminal voltage of the standard photovoltaic cell assembly includes the voltage generated by the standard photovoltaic cell assembly under the irradiation of the simulated sunlight of the simulated sunlight generator and the voltage generated by the standard photovoltaic cell assembly under the irradiation of the monochromatic light of the monochromatic light generator.

[0017] According to a spectral responsivity measurement system for a photovoltaic module provided by the present invention, the signal acquisition module includes a first signal conversion unit, a second signal conversion unit and a spectrum analyzer.

[0018] The first signal conversion unit is electrically connected to the photovoltaic component, and is used to receive the electrical signal of the test battery unit of the photovoltaic component to convert the electrical signal of the test battery unit into a spectrum analysis signal of the test battery unit, and transmit the spectrum analysis signal of the test battery unit to the spectrum analyzer.

[0019] The second signal conversion unit is electrically connected to the standard photovoltaic cell assembly, and is used to receive the electrical signal of the standard photovoltaic cell assembly to convert the electrical signal of the standard photovoltaic cell assembly into a spectrum analysis signal of the standard photovoltaic cell assembly, and transmit the spectrum analysis signal of the standard photovoltaic cell assembly to the spectrum analyzer.

[0020] A spectral responsivity measurement system for a photovoltaic module provided according to the present invention further comprises a plurality of narrow-band filters, wherein the narrow-band filters are arranged in a one-to-one correspondence with the sub-monochromatic light generators.

[0021] According to a spectral responsivity measurement system for a photovoltaic module provided by the present invention, the auxiliary light generator has a plurality of sub-auxiliary light generators.

[0022] The spectral responsivity measurement system of the photovoltaic module also includes a host computer, a plurality of monochromatic light drivers and an auxiliary light driver. The host computer is electrically connected to the monochromatic light driver, the auxiliary light driver and the signal acquisition module respectively.

[0023] The monochromatic light driver is electrically connected to the sub-monochromatic light generator in a one-to-one correspondence, and is used to control the sub-monochromatic light generator to emit monochromatic light with a preset frequency and a preset wavelength.

[0024] The auxiliary light driver is electrically connected to the plurality of auxiliary light sub-generators, and is used to control the plurality of auxiliary light sub-generators to provide auxiliary light to the non-test battery unit through a constant current driving mode.

[0025] The present invention also provides a method for measuring the spectral responsivity of a photovoltaic module, which is used in a spectral responsivity measurement system of any of the aforementioned photovoltaic modules; the method comprises: providing monochromatic light to a test cell unit of the photovoltaic module through a monochromatic light generator, providing auxiliary light to a non-test cell unit of the photovoltaic module through an auxiliary light generator, and providing a shading component to shield the cell units outside the test series component string of the photovoltaic module; wherein the monochromatic light has a preset frequency and a preset wavelength, the non-test cell unit and the test cell unit constitute a test series component string of the photovoltaic module, wherein the current of the non-test cell unit under the irradiation of the auxiliary light of the auxiliary light generator is greater than the current of the test cell unit under the irradiation of the monochromatic light of the monochromatic light generator.

[0026] The electrical signal generated by the test battery is received by a signal acquisition module to determine the spectral responsivity of the test battery unit through the electrical signal.

[0027] The present invention provides a system and method for measuring the spectral responsivity of a photovoltaic module. The shading component is used to shield the battery cells outside the test series component string of the photovoltaic module, which can prevent the battery cells outside the test series component string of the photovoltaic module from generating current, so that the corresponding bypass diodes of the battery cells outside the test series component string of the photovoltaic module are turned on; the auxiliary light generator is used to provide auxiliary light to the non-test battery cells, and the monochromatic light generator is used to provide monochromatic light to the test battery cells of the photovoltaic module, so that the current of the non-test battery cells under the auxiliary light of the auxiliary light generator is greater than the current of the test battery cells under the monochromatic light of the monochromatic light generator. In this way, the electrical signal of the photovoltaic module received by the signal acquisition module is the electrical signal of the test battery cell of the photovoltaic module. The spectral responsivity of the test battery cell can be determined through the electrical signal of the test battery cell, thereby realizing the measurement of the spectral responsivity of a single battery cell of the photovoltaic module without cutting the photovoltaic module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is one of the module schematic diagrams of the spectral responsivity measurement system of the photovoltaic module provided by the present invention;

[0030] Figure 2 This is the second module schematic diagram of the spectral responsivity measurement system of the photovoltaic module provided by the present invention;

[0031] Figure 3 It is a schematic flow chart of the method for measuring the spectral responsivity of a photovoltaic module provided by the present invention.

[0032] Reference numerals:

[0033] 10: Monochromatic light generator; 11: Sub-monochromatic light generator; 21: Test battery unit; 22: Non-test battery unit; 23: Test series component string; 30: Auxiliary light generator; 31: Sub-auxiliary light generator; 40: Shading component; 50: Signal acquisition module; 51: First signal conversion unit; 52: Second signal conversion unit; 53: Spectrum analyzer; 60: Simulated sunlight generator; 70: Mixing component; 80: Spectral component; 90: First bias component; 100: Second bias component; 110: Host computer; 120: Narrow-band filter; 130: Monochromatic light driver; 140: Auxiliary light driver; 150: Simulated sunlight driver; 160: Standard photovoltaic cell component. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Combine the following Figure 1 and Figure 2 The spectral responsivity measurement system of a photovoltaic module of the present invention is described.

[0036] See also Figure 1 As shown, this embodiment provides a spectral responsivity measurement system for a photovoltaic module, including: a monochromatic light generator 10 , an auxiliary light generator 30 , a shading component 40 and a signal acquisition module 50 .

[0037] The monochromatic light generator 10 is used to provide monochromatic light to the test cell unit 21 of the photovoltaic assembly, and the monochromatic light has a preset frequency and a preset wavelength.

[0038] The auxiliary light generator 30 is used to provide auxiliary light to the non-test battery unit 22, and the non-test battery unit 22 and the test battery constitute a test series assembly string 23 of the photovoltaic assembly, wherein the current of the non-test battery unit 22 under the auxiliary light of the auxiliary light generator 30 is greater than the current of the test battery unit 21 under the monochromatic light of the monochromatic light generator 10.

[0039] The shading assembly 40 is used to shield the battery cells outside the test series assembly string 23 of the photovoltaic assembly.

[0040] The signal acquisition module 50 is used to be electrically connected to the photovoltaic assembly to receive the electrical signal generated by the test battery unit 21 of the photovoltaic assembly, and the electrical signal is used to determine the spectral responsivity of the test battery unit 21.

[0041] Among them, the monochromatic light generator 10 is an LED (light-emitting diode) lamp group. The auxiliary light generator 30 can be a xenon lamp, a halogen lamp, a laser generator or an LED lamp group. The shading component 40 can be a baffle made of opaque material, a baffle with an opaque film on the surface, or an opaque film. The signal acquisition module 50 can be a signal analyzer or a spectrum analyzer 53. Exemplarily, the auxiliary light generator 30 can preferably use a white LED lamp group. The light effect or luminous efficiency of the white LED lamp group is higher, which can improve the energy saving of the spectral responsivity measurement system of the photovoltaic module.

[0042] The electrical signal is obtained according to the current generated by the test battery cell 21 . Exemplarily, the electrical signal may be the current itself generated by the test battery cell 21 .

[0043] Under the premise that monochromatic light has a frequency, the current generated by the test cell unit 21 of the photovoltaic module under the irradiation of monochromatic light has a corresponding frequency, and the electrical signal obtained according to the current of the test cell unit 21 also has a corresponding frequency. Therefore, the preset frequency of the monochromatic light is used to match the electrical signal of the test cell unit 21 of the photovoltaic module with the monochromatic light, and can be set according to the actual working conditions.

[0044] The preset wavelength of the monochromatic light provided by the monochromatic light generator 10 is within the spectral range to be measured, which may be the crystalline silicon solar cell response band range of 300-1200 nanometers, or other spectral ranges.

[0045] The photovoltaic assembly may include a plurality of battery cells, and the test battery cell 21 may be a battery cell selected from the plurality of battery cells of the photovoltaic assembly.

[0046] The circuit connection relationship between the multiple battery cells of the photovoltaic module may include series connection and parallel connection, and the multiple battery cells of the photovoltaic module may be divided into a series module string or a parallel module string according to the series connection or parallel connection relationship between the multiple battery cells. The test series module string 23 may be the series module string where the test battery cell 21 is located, and the non-test battery cell 22 may be one or more battery cells in the test series module string 23 except the test battery cell 21.

[0047] The battery cells of the photovoltaic module are correspondingly provided with bypass diodes. When a battery cell cannot generate electricity, the bypass diode can play a bypass role so that the current generated by other battery cells flows through the bypass diode corresponding to the battery cell. To measure the spectral responsivity of the test battery cell 21 of the photovoltaic module, it is necessary to eliminate the influence of the battery cells other than the test battery cell 21 in the photovoltaic module on the spectral response of the test battery cell 21. To this end, the shading component 40 can be used to shield the battery cells other than the test series component string 23 of the photovoltaic module to prevent the battery cells other than the test series component string of the photovoltaic module from generating current, so that the corresponding series of battery cells other than the test series component string 23 of the photovoltaic module are turned on with bypass diodes, so that the electrical signal generated by the test battery cell 21 of the photovoltaic module can be transmitted to the signal acquisition module 50.

[0048] Because the current in the series assembly string is the same as the minimum current generated by each battery cell in the series assembly string, by making the current of the non-test battery cell 22 under the auxiliary light of the auxiliary light generator 30 greater than the current of the test battery cell 21 under the monochromatic light of the monochromatic light generator 10, the current in the test series assembly string 23 can be made the same as the current of the test battery cell 21. In this way, the electrical signal of the photovoltaic assembly received by the signal acquisition module 50 is the electrical signal of the test battery cell 21 of the photovoltaic assembly, and the spectral responsivity of the test battery cell 21 can be determined through the electrical signal of the test battery cell 21, thereby realizing the measurement of the spectral responsivity of a single cell of the photovoltaic assembly without cutting the photovoltaic assembly.

[0049] In one embodiment, when the spectral responsivity of the test cell unit 21 and the spectral responsivity of the non-test cell unit 22 are substantially the same, the optical power of the auxiliary light generator 30 may be set to be greater than the optical power of the monochromatic light generator 10, so that the current of the non-test cell unit 22 under the irradiation of the auxiliary light of the auxiliary light generator 30 is greater than the current of the test cell unit 21 under the irradiation of the monochromatic light of the monochromatic light generator 10. In another embodiment, when the spectral responsivity of the test cell unit 21 is less than the spectral responsivity of the non-test cell unit 22, the optical power of the auxiliary light generator 30 is less than the optical power of the monochromatic light generator 10, so that the current of the non-test cell unit 22 under the irradiation of the auxiliary light of the auxiliary light generator 30 is greater than the current of the test cell unit 21 under the irradiation of the monochromatic light of the monochromatic light generator 10.

[0050] The present embodiment provides a spectral responsivity measurement system for a photovoltaic module. The shading component 40 shields the battery cells outside the test series component string 23 of the photovoltaic module, thereby preventing the battery cells outside the test series component string 23 of the photovoltaic module from generating current, so that the bypass diodes corresponding to the battery cells outside the test series component string 23 of the photovoltaic module are turned on. The auxiliary light generator 30 is used to provide auxiliary light to the non-test battery cell 22, and the monochromatic light generator 10 is used to provide monochromatic light to the test battery cell 21 of the photovoltaic module, so that the current of the non-test battery cell 22 under the auxiliary light of the auxiliary light generator 30 is greater than the current of the test battery cell 21 under the monochromatic light of the monochromatic light generator 10. In this way, the electrical signal of the photovoltaic module received by the signal acquisition module 50 is the electrical signal of the test battery cell 21 of the photovoltaic module. The spectral responsivity of the test battery cell 21 can be determined through the electrical signal of the test battery cell 21, thereby realizing the measurement of the spectral responsivity of a single cell of the photovoltaic module without cutting the photovoltaic module.

[0051] The multiple monochromatic lights with different wavelengths irradiate the test cell unit 21 of the photovoltaic module at the same time, so that the test cell unit 21 can generate a spectral response to each monochromatic light at the same time, thereby shortening the measurement period.

[0052] To shorten the measurement cycle, see Figure 2 As shown, further, based on the above embodiment, the monochromatic light generator 10 includes multiple sub-monochromatic light generators 11, and the preset frequencies of the monochromatic lights generated by each sub-monochromatic light generator 11 are different, and the preset wavelengths of the monochromatic lights generated by each sub-monochromatic light generator 11 are different.

[0053] When the test cell unit 21 of the photovoltaic module is irradiated with monochromatic light having a preset frequency, the frequency of the current generated corresponds to the preset frequency of the monochromatic light. In this way, multiple sub-monochromatic light generators 11 can be used to simultaneously provide monochromatic light to the test cell unit 21 of the photovoltaic module, so that the test cell unit 21 of the photovoltaic module can generate multiple currents, each with a different frequency. The wavelength of the monochromatic light corresponding to each current can be determined by the frequency of each current, so as to quickly obtain the electrical signals generated by the test cell unit 21 when multiple monochromatic lights irradiate the test cell unit 21 of the photovoltaic module.

[0054] Exemplarily, each sub-monochromatic light generator 11 may be powered and modulated by different driving frequencies, so that the preset frequencies of the monochromatic light generated by each sub-monochromatic light generator 11 are different. Each sub-monochromatic light generator 11 may be manufactured using chips of different semiconductor materials, so that the preset wavelengths of the monochromatic light generated by each sub-monochromatic light generator 11 are different.

[0055] In order to reduce the error between the spectral responsivity of the test battery unit 21 under the test environment and the spectral responsivity under the actual working condition, see Figure 2 As shown, further, based on the above embodiments, the spectral responsivity measurement system of the photovoltaic module also includes a simulated sunlight generator 60, and the simulated sunlight generator 60 is used to provide simulated sunlight to the test battery unit 21.

[0056] The spectral range of the simulated sunlight provided by the simulated sunlight generator 60 may simulate the spectral distribution of the AM1.5G standard solar spectrum, or may simulate other spectral distributions according to actual needs.

[0057] In this way, the current generated by the test cell unit 21 of the photovoltaic module under light includes the current generated by the test cell unit 21 of the photovoltaic module under monochromatic light and the current generated by the test cell unit 21 of the photovoltaic module under simulated sunlight. In order to facilitate the selection of the response of the test cell unit 21 to monochromatic light from the current, further, on the basis of the above-mentioned embodiments, the driving mode of the simulated sunlight generator 60 is a constant current driving mode.

[0058] Due to factors such as the spatial arrangement of the monochromatic light generator, the positions of the output lights of multiple sub-monochromatic light generators 11 irradiating the test cell unit 21 of the photovoltaic module are distributed differently, resulting in errors in the measurement results of the electrical signals of the test cell unit 21 of the photovoltaic module, affecting the measurement results of the light responsiveness of the test cell unit 21 of the photovoltaic module.

[0059] In order to improve the accuracy of the measurement results of the light response of the test cell unit 21 of the photovoltaic module, see Figure 2 As shown, further, on the basis of the above embodiments, the spectral responsivity measurement system of the photovoltaic module also includes a light mixing component 70, which is used to receive the output light of the multiple sub-monochromatic light generators 11, and mix the received light and transmit it to the test battery unit 21 and the standard photovoltaic cell module 160; or the light mixing component 70 is used to receive the output light of the multiple sub-monochromatic light generators 11 and the simulated sunlight of the simulated sunlight generator 60, and mix the received light and output it to the test battery unit 21 and the standard photovoltaic cell module 160.

[0060] The light mixing component 70 can be used to reflect and scatter the received light multiple times inside the light mixing component 70 to output mixed light with uniform intensity, brightness or radiance, thereby improving the accuracy of the measurement results of the light responsiveness of the test battery unit 21 of the photovoltaic component.

[0061] The light mixing component 70 may use an integrating sphere, etc. in addition to an optical homogenizer and an optical diffuser.

[0062] The monochromatic light output by the sub-monochromatic light generator 11 can be monochromatic light with a narrow bandwidth or monochromatic light with a wide bandwidth. When the monochromatic light output by the sub-monochromatic light generator 11 is monochromatic light with a wide bandwidth, it indicates that the precision of the sub-monochromatic light generator 11 is low and the production cost is also low. The bandwidth of the monochromatic light is the wavelength range of the monochromatic light. For example, the bandwidth of the monochromatic light output by a sub-monochromatic light generator 11 can be 540nm to 560nm.

[0063] In order to reduce production costs and increase the accuracy of the measurement results of the spectral responsivity of the test battery cell 21, see Figure 2 As shown, further, based on the above embodiments, the spectral responsivity measurement system of the photovoltaic module further includes a plurality of narrowband filters 120, and the narrowband filters 120 are arranged in a one-to-one correspondence with the sub-monochromatic light generator 11. In this way, the bandwidth of the monochromatic light output by the sub-monochromatic light generator 11 can be reduced, and the error between the wavelength of the monochromatic light irradiating the test battery unit 21 and the wavelength of the target monochromatic light can be reduced.

[0064] Exemplarily, in order to measure the spectral response of the test battery cell 21 to the target monochromatic light with a wavelength of 550nm, a narrowband filter 120 with a central wavelength of 550nm can be set corresponding to the sub-monochromatic light generator 11 capable of outputting monochromatic light of 540nm to 560nm, thereby basically eliminating the spectral response of the test battery cell 21 to light with a wavelength other than 550nm, so as to increase the accuracy of the measurement result of the spectral response of the test battery cell 21.

[0065] See also Figure 2 As shown, further, based on the above embodiments, the auxiliary light generator 30 has a plurality of sub-auxiliary light generators 31 .

[0066] The spectral responsivity measurement system of the photovoltaic module further includes a host computer 110 , a plurality of monochromatic light drivers 130 and an auxiliary light driver 140 . The host computer 110 is electrically connected to the monochromatic light driver 130 , the auxiliary light driver 140 and the signal acquisition module 50 , respectively.

[0067] The monochromatic light driver 130 is electrically connected to the sub-monochromatic light generator 11 in a one-to-one correspondence, and is used to control the sub-monochromatic light generator 11 to emit monochromatic light with a preset frequency and a preset wavelength.

[0068] The auxiliary light driver 140 is electrically connected to the plurality of auxiliary light sub-generators 31 , and is used to control the plurality of auxiliary light sub-generators 31 to provide auxiliary light to the non-test battery unit 22 in a constant current driving mode.

[0069] The spectral responsivity measurement system of the photovoltaic module provides auxiliary light to the non-test battery unit 22 by setting up multiple sub-auxiliary light generators 31, which can reduce the impact of the failure of a sub-auxiliary light generator 31 on the normal operation of the spectral responsivity measurement system of the photovoltaic module and enhance the stability of the spectral responsivity measurement system of the photovoltaic module.

[0070] The host computer 110 may send a control signal to the monochromatic light driver 130 to enable the monochromatic light driver 130 to send a driving signal to the corresponding sub-monochromatic light generator 11 to enable the sub-monochromatic light generator 11 to output monochromatic light with a preset frequency and a preset wavelength.

[0071] The host computer 110 may send a control signal to the auxiliary light driver 140 to enable the auxiliary light driver 140 to send a driving signal to the corresponding auxiliary light sub-generator 31 to enable the auxiliary light sub-generator 31 to output auxiliary light with a preset frequency and a preset wavelength.

[0072] It should be noted that the power required to drive the host computer 110, the monochromatic light driver 130, the sub-monochromatic light generator 11, the auxiliary light driver 140 and the sub-auxiliary light generator 31 to work can come from an external device or an internal device. In the case where the power required for the operation of the aforementioned devices comes from an internal device, the spectral responsivity measurement system of the photovoltaic module also includes a power supply component, which is electrically connected to the host computer 110, the monochromatic light driver 130, the sub-monochromatic light generator 11, the auxiliary light driver 140 and the sub-auxiliary light generator 31 respectively.

[0073] It should be noted that the host computer 110 can receive user input and send control signals to the monochromatic light driver 130 or the auxiliary light driver 140 , or send control signals to the monochromatic light driver 130 or the auxiliary light driver 140 based on a preset control program stored in the host computer 110 .

[0074] It should be noted that the simulated sunlight generator 60 can receive user input to provide simulated sunlight, and can also receive control signals from the host computer 110 to provide simulated sunlight. In the case where the simulated sunlight generator 60 receives control signals from the host computer 110 to provide simulated sunlight, the spectral responsivity measurement system of the photovoltaic module further includes a simulated sunlight driver 150, and the simulated sunlight driver 150 is electrically connected to the host computer 110 and the simulated sunlight generator 60, respectively.

[0075] The size of the photovoltaic module is relatively large. For example, the length of the photovoltaic module can be 2.4 meters and the width can be 1.2 meters. If the light spot provided by the auxiliary light generator is too small, it may cause the current of one or several non-test battery cells to be less than the current of the test battery cell, thereby causing measurement failure. To avoid the above problems, the spectral responsivity measurement system of the photovoltaic module is equipped with multiple sub-auxiliary light generators.

[0076] The spectral responsivity of the test battery cell 21 can be obtained by the relative spectral responsivity of the test battery cell 21. Generally, the relative spectral responsivity of the test battery cell 21 is obtained by measuring the short-circuit current of the battery cell and the short-circuit current of the standard photovoltaic cell assembly 160. Currently, the short-circuit current of the test battery cell 21 and the short-circuit current of the standard photovoltaic cell assembly 160 are generally obtained by sequentially irradiating the test battery cell 21 and the standard photovoltaic cell assembly 160 with monochromatic light, which results in a longer measurement cycle.

[0077] In order to shorten the measurement period of the short-circuit current of the test battery unit 21 and the short-circuit current of the standard photovoltaic cell assembly 160, see Figure 2 As shown, further, based on the above embodiments, the spectral responsivity measurement system of the photovoltaic module also includes a spectroscopic component 80, and the spectroscopic component 80 is used to receive the light output by the mixing component 70, and transmit the received light to the test cell unit 21 and the standard photovoltaic cell module 160 respectively.

[0078] The light splitting component 80 is used to split the light output by the light mixing component 70 into at least two beams, so as to simultaneously transmit the light output by the light mixing component 70 to the test battery unit 21 and the standard photovoltaic battery assembly 160. In this way, by setting the light splitting component 80, the spectral responsivity measurement system of the photovoltaic assembly can simultaneously measure the short-circuit current of the battery unit and the short-circuit current of the standard photovoltaic battery assembly 160, shortening the measurement cycle of the short-circuit current of the battery unit and the short-circuit current of the standard photovoltaic battery assembly 160, thereby shortening the measurement cycle of the spectral responsivity of the test battery unit 21.

[0079] The light splitting component 80 may be a beam splitter, a prism, or a Y-shaped light-guiding optical fiber.

[0080] See also Figure 2 As shown, further, based on the above embodiments in which the spectral responsivity measurement system of a photovoltaic component includes a simulated sunlight generator 60 , the spectral responsivity measurement system of a photovoltaic component also includes a first bias component 90 and a second bias component 100 .

[0081] The first bias component 90 is electrically connected to the photovoltaic component, and is used to adjust the terminal voltage of the test battery unit 21 to zero. The terminal voltage of the test battery unit 21 includes the voltage generated by the test battery unit 21 under the irradiation of the simulated sunlight of the simulated sunlight generator 60, the voltage generated by the test battery unit 21 under the irradiation of the monochromatic light of the monochromatic light generator 10, and the voltage generated by the non-test battery unit 22 under the irradiation of the auxiliary light of the auxiliary light generator 30.

[0082] The second bias component 100 is electrically connected to the standard photovoltaic cell component, and is used to adjust the terminal voltage of the standard photovoltaic cell component 160 to zero. The terminal voltage of the standard photovoltaic cell component 160 includes the voltage generated by the standard photovoltaic cell component 160 under the irradiation of the simulated sunlight of the simulated sunlight generator 60 and the voltage generated by the standard photovoltaic cell component 160 under the irradiation of the monochromatic light of the monochromatic light generator 10.

[0083] The monochromatic light generator 10, the simulated solar light generator 60 and the auxiliary light generator 30 can, but are not limited to, provide light simultaneously. When the monochromatic light generator 10, the simulated solar light generator 60 and the auxiliary light generator 30 provide light simultaneously, the monochromatic light generator 10 and the simulated solar light generator 60 can respectively provide mixed light to the test battery unit 21 and the standard photovoltaic cell assembly 160, and the auxiliary light generator 30 can provide light to the non-test battery unit 22.

[0084] The first bias component 90 can be used to apply a bias to the test series component string 23 of the photovoltaic component to offset the voltage generated by the non-test battery cell 22 in the test series component string 23 under the irradiation of the light provided by the auxiliary light generator 30, and the voltage generated by the test battery cell 21 under the irradiation of the simulated sunlight and the monochromatic light, so that the voltage across the test battery cell 21 under the irradiation of the simulated sunlight is zero, so as to measure the short-circuit current of the test battery cell 21. The second bias component 100 can be used to apply a bias to the circuit where the standard photovoltaic cell component 160 is located, offset the voltage generated by the standard photovoltaic cell component 160 under the irradiation of the simulated sunlight and the monochromatic light, so that the voltage across the standard photovoltaic cell component 160 under the irradiation of the simulated sunlight is zero, so as to measure the short-circuit current of the standard photovoltaic cell component 160.

[0085] Exemplarily, both the first bias assembly 90 and the second bias assembly 100 can be variable voltage sources. Two voltmeters can be electrically connected to the photovoltaic assembly and the standard photovoltaic cell assembly 160, respectively, so as to intuitively determine whether the voltages at both ends of the test battery unit 21 of the photovoltaic assembly and the standard photovoltaic cell assembly 160 are zero.

[0086] In the case where the monochromatic light generator 10, the simulated sunlight generator 60 and the auxiliary light generator 30 do not provide light at the same time, the auxiliary light generator 30 can be used to provide light to the non-test battery unit 22 first, and then the simulated sunlight generator 60 can be used to provide light to the test battery unit 21 and the standard photovoltaic cell assembly 160 respectively; the first bias component 90 is used to apply a bias to the test series assembly string 23 of the photovoltaic assembly to offset the voltage generated by the non-test battery unit 22 in the test series assembly string 23 under the irradiation of the light provided by the auxiliary light generator 30 and the voltage generated by the test battery unit 21 under the irradiation of the simulated sunlight and the monochromatic light; the second bias component 100 is used to apply a bias to the circuit where the standard photovoltaic cell assembly 160 is located to offset the voltage generated by the standard photovoltaic cell assembly 160 under the irradiation of the simulated sunlight and the monochromatic light; finally, the monochromatic light generator 10 is used to provide light to the test battery unit 21 and the standard photovoltaic cell assembly 160 respectively, so as to obtain the electrical signal generated by the test battery unit.

[0087] See also Figure 2 As shown, further, based on the above embodiments, the signal acquisition module 50 includes a first signal conversion unit 51, a second signal conversion unit 52 and a spectrum analyzer 53.

[0088] The first signal conversion unit 51 is electrically connected to the photovoltaic component, and is used to receive the electrical signal of the test battery unit 21 of the photovoltaic component, so as to convert the electrical signal of the test battery unit 21 into a spectrum analysis signal of the test battery unit 21, and transmit the spectrum analysis signal of the test battery unit 21 to the spectrum analyzer 53.

[0089] The second signal conversion unit 52 is electrically connected to the standard photovoltaic cell assembly 160, and is used to receive the electrical signal of the standard photovoltaic cell assembly 160, so as to convert the electrical signal of the standard photovoltaic cell assembly 160 into a spectrum analysis signal of the standard photovoltaic cell assembly 160, and transmit the spectrum analysis signal of the standard photovoltaic cell assembly 160 to the spectrum analyzer 53.

[0090] The spectrum analyzer 53 can accurately and quickly analyze the spectrum distribution of the received spectrum analysis signal, so as to accurately and quickly match the monochromatic light with a preset frequency and a preset wavelength with the electrical signal generated by the test cell unit 21 irradiated by the monochromatic light and the electrical signal generated by the standard photovoltaic cell assembly 160 irradiated by the monochromatic light, without further data matching processing of the acquired waveform diagrams of multiple electrical signals of the test cell unit 21, the waveform diagrams of multiple electrical signals of the standard photovoltaic cell assembly 160 and the monochromatic light of multiple different frequencies and wavelengths. In this way, the time consumption of matching the monochromatic light with a preset frequency and a preset wavelength with the electrical signal generated by the test cell unit 21 irradiated by the monochromatic light and the electrical signal generated by the standard photovoltaic cell assembly 160 irradiated by the monochromatic light can be shortened, thereby shortening the measurement period of the spectral responsivity of the test cell unit 21.

[0091] Exemplarily, the first signal conversion unit 51 may be a first sampling resistor, which may be used to receive the current of the test battery cell 21 to convert the current of the test battery cell 21 into a voltage of the first sampling resistor, and transmit the voltage of the first sampling resistor to the spectrum analyzer 53 .

[0092] The second signal conversion unit may be a second sampling resistor, which may be used to receive the current of the test battery cell 21 , convert the current of the test battery cell 21 into a voltage of the second sampling resistor, and transmit the voltage of the second sampling resistor to the spectrum analyzer 53 .

[0093] The spectrum analyzer 53 may be a dual-channel spectrum analyzer 53 so as to simultaneously receive the spectrum analysis signal of the test cell unit 21 and the spectrum analysis signal of the standard photovoltaic cell assembly 160 , thereby shortening the measurement period of the spectral responsivity of the test cell unit 21 .

[0094] The electrical signal generated by the test battery cell may be not only the current generated by the test battery cell itself, but also the voltage of the second sampling resistor converted from the current of the test battery cell.

[0095] The present embodiment provides a spectral responsivity measurement system for a photovoltaic module, which can measure the spectral responsivity of a single cell of a photovoltaic module without cutting the photovoltaic module; can use multiple beams of monochromatic light with different wavelengths to simultaneously illuminate the test cell unit 21 of the photovoltaic module, and can make the test cell unit 21 simultaneously produce a spectral response to each beam of monochromatic light, thereby shortening the measurement period; can reduce the error between the spectral responsivity of the test cell unit 21 under a test environment and the spectral responsivity under actual working conditions; can provide light to the test cell unit 21 and the standard photovoltaic cell module 160 at the same time, shortening the measurement period of the short-circuit current of the cell unit and the short-circuit current of the standard photovoltaic cell module 160, and can use a spectrum analyzer 53 to simultaneously receive the spectrum analysis signal of the test cell unit 21 and the spectrum analysis signal of the standard photovoltaic cell module 160, thereby shortening the measurement period of the spectral responsivity of the test cell unit 21.

[0096] In order to specifically illustrate the function of the spectral responsivity measurement system of a photovoltaic module provided by this embodiment, a specific example is provided below.

[0097] The spectral responsivity measurement system of a photovoltaic module includes an industrial computer, multiple monochrome LED drivers, multiple monochrome LED light groups, multiple narrow-band filters, a color LED driver, a color LED light group, an integrating sphere, a Y-shaped light-guiding optical fiber, a white light LED driver, multiple white light LED light groups, a standard photovoltaic cell, a photovoltaic module, a first voltmeter, a first bias source, a first sampling resistor, a second voltmeter, a second bias source, a second sampling resistor and a dual-channel spectrum analyzer.

[0098] The industrial computer is electrically connected to multiple monochrome LED drivers, color LED drivers, white light LED drivers and a dual-channel spectrum analyzer respectively; the multiple monochrome LED drivers are electrically connected to multiple monochrome LED light groups in a one-to-one correspondence; the color LED drivers are electrically connected to the color LED light groups; and the white light LED drivers are electrically connected to multiple white light LED light groups respectively.

[0099] The standard photovoltaic cell is electrically connected to the first voltmeter, the first bias source and the first sampling resistor respectively, and the photovoltaic module is electrically connected to the second voltmeter, the second bias source and the second sampling resistor respectively.

[0100] The input end of the integrating sphere corresponds to multiple monochrome LED light groups and color LED light groups to receive light emitted by the multiple monochrome LED light groups and color LED light groups; the output end of the integrating sphere corresponds to the input end of the Y-type light-guiding optical fiber to output uniform mixed light with intensity, brightness or radiance to the input end of the Y-type light-guiding optical fiber.

[0101] After determining the test cell unit of the photovoltaic module and the non-test cell unit in the test series assembly string, the output end of the Y-shaped light-guiding optical fiber can be adjusted to correspond to the standard photovoltaic cell and the test cell unit of the photovoltaic module, respectively, so as to output uniform mixed light of intensity, brightness or radiance to the standard photovoltaic cell and the photovoltaic module, respectively. Among them, the bifurcated end of the Y-shaped light-guiding optical fiber is the output end, and the other end is the input end. In this specific example, the spectral responsivity of the test cell unit of the photovoltaic module is substantially the same as the spectral responsivity of the non-test cell unit, and a plurality of white light LED lamp groups can be adjusted to correspond to the non-test cell unit of the photovoltaic module, so as to output white light having a light power greater than the light power of each monochromatic light to the non-test cell unit. In this way, the current of the non-test cell unit under the irradiation of white light can be made greater than the current of the test cell unit under the irradiation of the monochromatic light of the monochromatic LED lamp group.

[0102] The first bias source is a variable voltage source. By adjusting the voltage output of the first bias source, the first voltmeter measures the terminal voltage of the standard photovoltaic cell to be zero under the irradiation of light emitted by the colored LED light group. The second bias source is a variable voltage source. By adjusting the voltage output of the second bias source, the second voltmeter measures the terminal voltage of the photovoltaic module to be zero under the irradiation of light emitted by the colored LED light group. On this basis, multiple white light LED lamp groups transmit white light to non-test battery units, and the output end of the Y-shaped light-guiding optical fiber transmits uniform mixed light of intensity, brightness or radiance to the standard photovoltaic cells and photovoltaic modules respectively; the first sampling resistor can receive each current signal of the standard photovoltaic cell, convert the current signal of the standard photovoltaic cell into each voltage signal of the first sampling resistor, and transmit it to the dual-channel spectrum analyzer; the second sampling resistor can receive each current signal of the photovoltaic module, convert the current signal of the photovoltaic module into each voltage signal of the second sampling resistor, and transmit it to the dual-channel spectrum analyzer; the dual-channel spectrum analyzer can measure and analyze each voltage signal of the first sampling resistor to measure and analyze each spectrum signal corresponding to the standard photovoltaic cell; the dual-channel spectrum analyzer can measure and analyze each voltage signal of the second sampling resistor to measure and analyze each spectrum signal corresponding to the photovoltaic module. The dual-channel spectrum analyzer can transmit the measurement and analysis results of each spectrum signal corresponding to the standard photovoltaic cell and each spectrum signal corresponding to the photovoltaic module to the engineering machine.

[0103] The spectral responsivity measurement method of the photovoltaic module provided by the present invention is described below. The spectral responsivity measurement method of the photovoltaic module described below and the spectral responsivity measurement system of the photovoltaic module described above can be referred to each other.

[0104] This embodiment provides a method for measuring the spectral responsivity of a photovoltaic module, which is used in any of the above-mentioned systems for measuring the spectral responsivity of a photovoltaic module; see Figure 3 As shown, the method includes step 201 and step 202.

[0105] Step 201, setting a monochromatic light generator to provide monochromatic light to the test battery cell of the photovoltaic module, setting an auxiliary light generator to provide auxiliary light to the non-test battery cell of the photovoltaic module, and setting a shading component to shield the battery cells outside the test series component string of the photovoltaic module; wherein the monochromatic light has a preset frequency and a preset wavelength, the non-test battery cell and the test battery cell constitute the test series component string of the photovoltaic module, wherein the current of the non-test battery cell under the irradiation of the auxiliary light of the auxiliary light generator is greater than the current of the test battery cell under the irradiation of the monochromatic light of the monochromatic light generator.

[0106] Step 202: Receive the electrical signal generated by the test battery cell through a signal acquisition module to determine the spectral responsivity of the test battery cell through the electrical signal.

[0107] The setting can be understood as controlling the corresponding components to complete the corresponding functions according to the artificial setting instructions, and the shading component can be understood as a component controlled by the electric control instructions. The monochromatic light generator, the auxiliary light generator and the signal acquisition module can also be understood as a device controlled by the electric control instructions.

[0108] The working principle and technical effect of the spectral responsivity measurement method of a photovoltaic module provided in this embodiment are substantially the same as the working principle and technical effect of the spectral responsivity measurement system of the photovoltaic module described above, and are not described in detail here.

[0109] The system embodiment described above is merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0110] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A spectral responsivity measurement system for photovoltaic modules, characterized in that: include: A monochromatic light generator, the monochromatic light generator is used to provide monochromatic light to the test cell unit of the photovoltaic assembly, the monochromatic light having a preset frequency and a preset wavelength; The monochromatic light generator comprises a plurality of sub-monochromatic light generators, the preset frequencies of the monochromatic lights generated by each sub-monochromatic light generator are different, and the preset wavelengths of the monochromatic lights generated by each sub-monochromatic light generator are different; An auxiliary light generator, the auxiliary light generator is used to provide auxiliary light to a non-test battery unit, the non-test battery unit and the test battery constitute a test series assembly string of the photovoltaic assembly; wherein the current of the non-test battery unit under the auxiliary light of the auxiliary light generator is greater than the current of the test battery unit under the monochromatic light of the monochromatic light generator; A shading component, the shading component is used to shield the battery cells outside the test series component string of the photovoltaic component; A signal acquisition module, the signal acquisition module is used to be electrically connected to the photovoltaic assembly to receive an electrical signal generated by a test battery unit of the photovoltaic assembly, the electrical signal being used to determine the spectral responsivity of the test battery unit; the signal acquisition module includes a spectrum analyzer; in, The multiple sub-monochromatic light generators include multiple LED light groups; Also included is a simulated sunlight generator, the simulated sunlight generator is used to provide simulated sunlight to the test battery unit; It also includes a light mixing component, which is used to receive the output lights of the multiple sub-monochromatic light generators and mix the received lights before transmitting them to the test battery unit; or The light mixing component is used to receive the output light of the multiple sub-monochromatic light generators and the simulated sunlight of the simulated sunlight generator, and mix the received light and output it to the test battery unit; The light mixing component reflects and scatters the received light multiple times inside, and outputs mixed light with uniform intensity, brightness or radiance, thereby improving the accuracy of the measurement result of the light response degree of the test battery unit of the photovoltaic component.

2. The spectral responsivity measurement system of a photovoltaic module according to claim 1, characterized in that: It also includes a light splitting component, which is used to receive the light output by the light mixing component and transmit the received light to the test battery unit and the standard photovoltaic cell component respectively.

3. The spectral responsivity measurement system of a photovoltaic module according to claim 2, characterized in that: Also included is a first biasing assembly and a second biasing assembly; The first bias component is electrically connected to the photovoltaic component and is used to adjust the road terminal voltage of the test battery unit to zero, wherein the road terminal voltage of the test battery unit includes the voltage generated by the test battery unit under the irradiation of the simulated sunlight of the simulated sunlight generator, the voltage generated by the test battery unit under the irradiation of the monochromatic light of the monochromatic light generator, and the voltage generated by the non-test battery unit under the irradiation of the auxiliary light of the auxiliary light generator; The second bias assembly is electrically connected to the standard photovoltaic cell assembly and is used to adjust the road terminal voltage of the standard photovoltaic cell assembly to zero. The road terminal voltage of the standard photovoltaic cell assembly includes the voltage generated by the standard photovoltaic cell assembly under the irradiation of the simulated sunlight of the simulated sunlight generator and the voltage generated by the standard photovoltaic cell assembly under the irradiation of the monochromatic light of the monochromatic light generator.

4. The spectral responsivity measurement system of a photovoltaic module according to claim 2, characterized in that: The signal acquisition module also includes a first signal conversion unit and a second signal conversion unit; The first signal conversion unit is electrically connected to the photovoltaic assembly, and is used to receive the electrical signal of the test battery unit of the photovoltaic assembly, so as to convert the electrical signal of the test battery unit into a spectrum analysis signal of the test battery unit, and transmit the spectrum analysis signal of the test battery unit to the spectrum analyzer; The second signal conversion unit is electrically connected to the standard photovoltaic cell assembly, and is used to receive the electrical signal of the standard photovoltaic cell assembly to convert the electrical signal of the standard photovoltaic cell assembly into a spectrum analysis signal of the standard photovoltaic cell assembly, and transmit the spectrum analysis signal of the standard photovoltaic cell assembly to the spectrum analyzer.

5. The spectral responsivity measurement system of a photovoltaic module according to claim 1, characterized in that: It also includes a plurality of narrow-band filters, which are arranged in one-to-one correspondence with the sub-monochromatic light generators.

6. The spectral responsivity measurement system of a photovoltaic module according to claim 1, characterized in that: The auxiliary light generator has a plurality of sub-auxiliary light generators; It also includes a host computer, a plurality of monochromatic light drivers and an auxiliary light driver, wherein the host computer is electrically connected to the monochromatic light driver, the auxiliary light driver and the signal acquisition module respectively; The monochromatic light driver is electrically connected to the sub-monochromatic light generator in a one-to-one correspondence, and is used to control the sub-monochromatic light generator to emit monochromatic light with a preset frequency and a preset wavelength; The auxiliary light driver is electrically connected to the plurality of auxiliary light sub-generators, and is used to control the plurality of auxiliary light sub-generators to provide auxiliary light to the non-test battery unit through a constant current driving mode.

7. A method for measuring the spectral responsivity of a photovoltaic module, characterized in that: A spectral responsivity measurement system for a photovoltaic module as claimed in any one of claims 1 to 6; The method comprises: A monochromatic light generator is provided to provide monochromatic light to the test battery cell of the photovoltaic module, an auxiliary light generator is provided to provide auxiliary light to the non-test battery cell of the photovoltaic module, and a shading component is provided to shield the battery cells outside the test series component string of the photovoltaic module; wherein the monochromatic light has a preset frequency and a preset wavelength, the non-test battery cell and the test battery cell constitute the test series component string of the photovoltaic module, wherein the current of the non-test battery cell under the irradiation of the auxiliary light of the auxiliary light generator is greater than the current of the test battery cell under the irradiation of the monochromatic light of the monochromatic light generator; The electrical signal generated by the test battery cell is received by a signal acquisition module to determine the spectral responsivity of the test battery cell through the electrical signal.

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