SOLAR CELL INSPECTION DEVICE AND SOLAR CELL INSPECTION METHOD

• Main Authors: HIGUCHI MASAO, KANAI TOMOYOSHI
• Format: Patent
• Language: English; Japanese
• Published: 14.12.2017
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-REDRADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, E.G. USINGPHOTOVOLTAIC [PV] MODULES; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

PROBLEM TO BE SOLVED: To inspect the presence/absence of an open failure in a by-pass diode of a solar cell string in which a polarity is unknown.SOLUTION: A solar cell inspection device comprises: a voltage output part 2 that an inspection voltage Vtst of a voltage value V1 which is lower than a total of a forward voltage as a diode of a n×m solar battery 23 and is higher than the total of the forward voltage of a n by-pass diode 24; a current detection part 4 that detects whether a current I flows in a solar cell string 12; and a processing part 6 that determines the presence of open failures when the current I does not flow, on the basis of a first inspection result and a second inspection result in the current detection part 4 when the inspection voltage Vtst in first polarity and second polarity opposite to first polarity is applied to the solar cell string 12, and determines the absence of open failures when one of the first and second inspection results is that the current I does not flow and the other of first and second inspection results is that the current I flows.SELECTED DRAWING: Figure 1 【課題】極性が未知の太陽電池ストリングのバイパスダイオードについてのオープン故障の有無を検査する。【解決手段】ｎ×ｍ個の太陽電池２３のダイオードとしての順方向電圧の総和を下回り、かつｎ個のバイパスダイオード２４の順方向電圧の総和を上回る電圧値Ｖ１の検査電圧Ｖｔｓｔを出力する電圧出力部２と、太陽電池ストリング１２に電流Ｉが流れているか否かを検出する電流検出部４と、第１極性およびその逆の第２極性で検査電圧Ｖｔｓｔが太陽電池ストリング１２に印加されているときの電流検出部４での第１検出結果および第２検出結果に基づき、第１および第２検出結果が電流Ｉが流れていないとの結果のときは、オープン故障有りと判別し、第１および第２検出結果の一方が電流Ｉが流れていないとの結果で、かつ第１および第２検出結果の他方が電流Ｉが流れているとの結果のときには、オープン故障無しと判別する処理部６とを備えている。【選択図】図１