A new type of crystalline silicon solar cell test classification method

A technology for solar cells and crystalline silicon, which is used in semiconductor/solid-state device testing/measurement, circuits, electrical components, etc. It can solve the problems of poor battery current and low matching, and achieve higher output, higher matching, and lower packaging. effect of loss

Inactive Publication Date: 2019-02-19
BAODING GUANGWEI GREEN ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the problem that the test and sorting method in the above-mentioned prior art will cause the battery current difference to be too large and the matching degree of the battery to be packaged is low, an optimized new crystalline silicon solar cell test sorting method is proposed. file method

Method used

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  • A new type of crystalline silicon solar cell test classification method

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Embodiment 1

[0029] Embodiment 1 provides a method for testing and grading of crystalline silicon solar cells. The specific steps are as follows:

[0030] A: Establish the binning mode of current binning first and then efficiency binning, and use the computer to simulate the idealized model of the battery bin binning interval, conduct experiments on a large number of battery cells and collect data, and analyze the corresponding current interval in turn The pros and cons of each function of the cells in each efficiency range are screened. When the minimum operating current value of each segment and the minimum efficiency value of each gear are consistent or close to the idealized model, the control group distribution model is established.

[0031] B: Put each cell into the Halm tester equipment for test sorting;

[0032] S: In the test sorting step, the first stage of working current is prioritized:

[0033] S1: In step S, first perform a working current test on each cell to obtain the working curr...

Embodiment 2

[0043] In Example 2, the sorting test steps in specific work are as follows:

[0044] A batch of 156 polycrystalline cells with rounded corners was tested for working current, and the working current value was set to the optimal current range of [8.225A, 8.345A] after comparison.

[0045] After comparison, it is found that the optimal current interval needs to select two natural numbers as the interval range difference. Set the interval range difference to a1=0.05A and a2=0.07A respectively, then the optimal current interval is divided into two stages, respectively Are the first sub-current interval [8.225A, 8.295A) and the second sub-current interval [8.295A, 8.345A];

[0046] If the cells whose working current value belongs to [8.225A, 8.295A] are classified into the first sub-current interval, the first sub-current interval is defined as the first gear, and the working current value belongs to [8.295A, 8.345A] If the cells are classified into the second sub-current interval, the ...

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Abstract

The invention relates to a novel test and grading method for a crystal silicon solar cell, which is a method for optimally using grades at a working current and grading battery pieces of the same working current grade again through battery efficiency. Flexible grading intervals are set with regard to different situations during grading the battery pieces, different grading intervals are used according to different parameter states of different batches of battery pieces, the difference between the maximum working current and the minimum working current is greatly reduced, the discrete degree is integrated, the matching of the working currents of battery pieces of the whole module unit is achieved, the package loss of the whole module is reduced, meanwhile, the light and shade phenomenon of module E1 test can be also corresponding improved, the yield from batteries to modules is improved, and the primary finished rate of assembly fabrication is improved.

Description

Technical field [0001] The invention belongs to the manufacturing field of crystalline silicon solar cells, and particularly relates to a new type of crystalline silicon solar cell test and classification method. Background technique [0002] At present, the solar cell production process must be tested and sorted first. The purpose of the test sorting is to reduce the working current difference of the unit cells. The currently commonly used test classification method is: first use battery efficiency for coarse classification , And then subdivide the cells of the same battery efficiency level through the working current, and use the cells of the same efficiency level (60-72 cells) for series packaging when the module is packaged; this sorting method will result in the same battery efficiency The dispersion of the working current difference of the unit cells of the gears is relatively large, and even the maximum working current and the minimum working current difference is greater ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L21/66
CPCH01L22/14
Inventor 方再华杨艳景
Owner BAODING GUANGWEI GREEN ENERGY TECH CO LTD
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