Solar Cell Measurement Jig for Busbarless Electrodes
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Solution Overview
Problem
Measuring electrical characteristics of solar battery cells with a busbarless structure is challenging due to misalignment of probe pins with finger electrodes, leading to incomplete contact and inaccurate measurements.
Innovation Solution
A solar battery measurement jig with a holder that accommodates multiple probe pins arranged in a linear or zig-zag pattern, allowing for increased contact points with finger electrodes, ensuring all electrodes are contacted and minimizing shadow loss, thereby enabling accurate electrical characteristic measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single probe pin is used to measure electrical characteristics, then the device complexity is low, but the measurement precision deteriorates due to incomplete contact with finger electrodes
Solution Approach 1:
The measurement terminal is segmented into multiple probe pins (at least two) that contact different finger electrodes simultaneously. This segmentation allows comprehensive measurement of electrical characteristics by capturing current from multiple electrode contacts, resolving the contradiction between simple device structure and precise measurement.
2Measurement precision
If the holder width is increased to accommodate more probe pins, then the measurement precision improves through better electrode contact, but the shadow loss increases reducing output
Solution Approach 1:
The probe pins are arranged in a longitudinal direction along the holder rather than spreading laterally. This dimensional reconfiguration allows multiple probe pins to contact finger electrodes along the length of the solar battery cell without significantly increasing the holder's width, thus maintaining measurement precision while minimizing shadow loss and output reduction.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Electrical characteristics are measured accurately, even for solar battery cells having a busbarless structure. This invention, which has a plurality of probe pins (4) which are brought into contact with a linear electrode (3a) formed on the surface of a solar battery cell (2), and a holder (5) for holding the probe pins (4), is provided with: a current measuring terminal (6) that is formed by a plurality of probe pins (4) arranged thereon, and disposed on the linear electrode (3a) so as to measure current characteristics of the solar battery cell (2); and a voltage measuring terminal (7) that is formed by a plurality of probe pins (4) arranged thereon, and disposed on the linear electrode (3 a) so as to measure voltage characteristics of the solar battery cell (2), and in this structure, the current measuring terminal (6) and the voltage measuring terminal (7) are disposed in parallel with each other.