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Solar battery module test method

A technology of solar cells, inspection methods, applied in the field of inspection of solar cell modules, capable of solving problems such as loss of opportunity, loss of power, etc.

Inactive Publication Date: 2018-12-21
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the solar battery module is left unnoticed by the user for a long time without being noticed by the user in a state where the output drops, resulting in the loss of the power that should be able to generate electricity, and there is also a problem that the opportunity for the power sale is lost when the power sale is in progress.

Method used

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Experimental program
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Embodiment approach 1

[0036] figure 1 It is a diagram showing the configuration of a solar power generation system using a solar cell module as an inspection target in the solar cell module inspection method according to Embodiment 1 of the present invention. An element in which solar cell modules 11 are connected in series is called a string 12 . In addition, the number of strings 12 connected in series is selected within a range not exceeding the system voltage of the solar power generation system itself.

[0037] The strings 12 are connected in parallel to the connection box 13 . In Embodiment 1, the connection box 13 is also connected in parallel to the current collection box 14 . In addition, the number of parallel connections of strings 12 and connection boxes 13 is not limited to a specific number. Generally speaking, if the number of parallel connections of strings 12 is increased, the current can be increased, but transmission loss also increases and power generation efficiency decreases...

Embodiment approach 2

[0096] Figure 14 It is a diagram showing the configuration of a solar cell module to be inspected in the solar cell module inspection method according to Embodiment 2 of the present invention. The same reference numerals are assigned to the same parts as those in Embodiment 1, and description thereof will be omitted. In Embodiment 2, five clusters 41A, 41B, 41C, 41D, and 41E of solar cell modules 16 to be inspected are connected in series.

[0097] The cluster 41A forms a first solar cell cluster 411 . Cluster 41B forms a second solar cell cluster 412 . Cluster 41C forms a third solar cell cluster 413 . Cluster 41D forms a fourth solar cell cluster 414 . Cluster 41E forms fifth solar cell cluster 415 . The first solar cell cluster 411 , the second solar cell cluster 412 , the third solar cell cluster 413 , the fourth solar cell cluster 414 and the fifth solar cell cluster 415 are sequentially connected in series to form a solar cell array.

[0098] The first terminal po...

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Abstract

Provided is a solar battery module test method for testing a solar battery module (11) having a solar battery array in which a plurality of clusters (41A, 41B, 41C, 41D, 41E, 41F) each having a plurality of solar battery cells connected in series are connected in parallel. The value of a current flowing through an internal circuit of the solar battery module (11) is measured without contacting theinternal circuit in order to detect a short-circuit failure and an open-circuit failure of a first solar battery cluster (411), a second solar battery cluster (412), and a third solar battery cluster(413), and a short-circuit failure and an open-circuit failure of a first bypass diode (48), a second bypass diode (49), and a third bypass diode (410).

Description

technical field [0001] The present invention relates to a solar cell module inspection method for inspecting a solar cell module in which a plurality of clusters of solar cell cells connected in series are connected in parallel. Background technique [0002] A solar cell module is often installed outdoors to generate electricity by receiving sunlight. Therefore, immediately after installation, the solar cell module is exposed to various stresses such as diurnal temperature change stress, inter-seasonal temperature fluctuation stress, stress due to temperature and humidity, and load stress due to strong wind or snow accumulation. [0003] Even if the solar cell module deteriorates due to various stresses and the output drops, unlike other electrical equipment, the solar cell module rarely stops operating, generates abnormal noise, or has a noticeable change in appearance. Therefore, the solar battery module is left unnoticed by the user for a long time without being noticed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S50/10H01L31/044
CPCH02S50/10Y02E10/50G01R19/0092H01L31/0504H01L31/0725H01L31/18H01L31/044
Inventor 中村仁志
Owner MITSUBISHI ELECTRIC CORP