Combinatorial Flux Adder for Photovoltaic Cell Nonlinearity
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Solution Overview
Problem
Current methods fail to accurately determine the nonlinear response of photovoltaic cells, which is crucial for understanding their performance and spectral dependence, especially under varying irradiance conditions.
Innovation Solution
A combinatorial flux adder system that uses multiple light emitters, such as LEDs, to produce controlled photon fluxes, allowing for the irradiation of photovoltaic cells with singular and combined light pulses, enabling the determination of nonlinear relationships through a system of polynomial equations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current measurement methods are used, then the measurement process is simple, but the accuracy in determining nonlinear response is insufficient
Solution Approach 1:
The measurement system is segmented into multiple independent light emitters (first light emitter, second light emitter) that can be individually controlled. This segmentation allows for systematic measurement of nonlinear responses by varying the contribution of each emitter, thereby improving measurement accuracy while maintaining manageable system complexity through modular design.
Solution Approach 2:
The invention introduces a new dimension to the measurement process by using multiple light emitters with independently controllable photon fluxes. Instead of measuring along a single flux dimension, the system measures across multiple flux combinations (first flux alone, second flux alone, combined fluxes), creating a multidimensional measurement space that enables accurate determination of nonlinear responses.
2Measurement precision
If multiple light emitters are used to determine nonlinear response, then measurement accuracy improves, but the device complexity increases
Solution Approach 1:
The flux adder system is designed with multi-functionality, where the same system can measure nonlinear responses under various flux conditions (different combinations of first and second light emitters). The driver circuit can universally control any subset of light emitters, and the measurement process can universally determine nonlinear characteristics across different operating points, reducing the need for multiple specialized measurement systems.
Solution Approach 2:
The system exploits parameter changes in photon flux from multiple light emitters to determine nonlinear responses. By varying the flux parameters (magnitude, combination) of the first and second light emitters, the system captures the nonlinear behavior of the photovoltaic cell across different operating conditions, improving measurement precision without requiring fundamentally different measurement apparatus.
3Measurement precision
If singular and combinatorial fluxes are measured separately, then nonlinear response determination is accurate, but the measurement time increases
Solution Approach 1:
The measurement process employs periodic action by systematically cycling through different flux combinations (first flux alone, second flux alone, combined fluxes) in a structured sequence. This periodic measurement approach allows for efficient data collection across multiple operating points, enabling accurate nonlinear response determination while minimizing total measurement time through optimized measurement cycles.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for the precise measurement of nonlinear responses and spectral dependence, providing a globally scaled solution for photovoltaic cells, even under non-standard conditions, and corrects for nonlinearity in irradiance measurements.
Implementation Method 1
A combinatorial flux adder to determine a nonlinear response of a photovoltaic cell includes a plurality of light emitters, such as light emitting diodes (LEDs)
Implementation Method 2
irradiating a photovoltaic cell with the first set in an absence of the second set and the combinatorial set... producing, by the photovoltaic cell, a first photovoltaic output in response to irradiating the photovoltaic cell
Data Source
AI summary
A process for determining a nonlinear response of a photovoltaic cell that includes: producing a first set of first light pulses including a first light that includes a first photon flux; and different first magnitudes of first photon flux; producing a second set of second light pulses that include: a second light including a second photon flux; and different second magnitudes of second photon flux; repeating the first light pulses in a selected combination with the second light pulses to produce a combinatorial set of combinatorial light pulses including: a combinatorial light comprising a combinatorial photon flux and different combinatorial magnitudes; irradiating a photovoltaic cell separately with the first set, second set, and the combinatorial set; separately producing, a first, second, and combinatorial photovoltaic output; and solving a system of linear equations to determine the nonlinear relationship between the photovoltaic output and the magnitude of flux.