Title:
ESTIMATION METHOD FOR OPERATION VOLTAGE OF SOLAR BATTERY CELL IN SOLAR CELL MODULE AND SOLAR BATTERY CELL OPERATION VOLTAGE ESTIMATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2020/122105
Kind Code:
A1
Abstract:
An estimation method for a cell operation voltage includes: bringing one cell into a state in which light is shielded; detecting a small change of the output current of a module in that state; irradiating another cell with a modulated light in that state and detecting a small change of the output current; detecting the operation voltage of the module in that state; generating a first calibration line (L1) by connecting a first point (P1) and a second point (P2) which are plotted on a coordinate axis along which voltages and resistor relative ratios (r△I) are set; irradiating a cell, the operation voltage of which is to be estimated, with the modulated light in a state in which none of the cells is shielded from light and detecting a small change of the output current of the module; detecting the operation voltage of the module in that state; generating a second calibration line (L2) by connecting a third point (P3) and the second point (P2) which are plotted on the coordinate axis; calculating a resistor relative ratio value of the cell, the operation voltage of which is to be estimated; and calculating a value of the voltage of a fourth point (P4) as an operation voltage of the cell to be estimated, said fourth point (P4) being a point that becomes the resistor relative ratio value and lies on the second calibration line (L2).
Inventors:
KOBAYASHI YASUYUKI (JP)
KISU SHUNSUKE (JP)
KISU SHUNSUKE (JP)
Application Number:
PCT/JP2019/048430
Publication Date:
June 18, 2020
Filing Date:
December 11, 2019
Export Citation:
Assignee:
UNIV TEIKYO (JP)
International Classes:
H02S50/10
Domestic Patent References:
| WO2018135123A1 | 2018-07-26 | |||
| WO2018135123A1 | 2018-07-26 |
Foreign References:
| JP2013131678A | 2013-07-04 | |||
| JP2013070045A | 2013-04-18 | |||
| US20170163213A1 | 2017-06-08 | |||
| JP2018233647A | 2018-12-13 |
Other References:
KOBAYASHI, YASUYUKI ET AL.: "Contactless Estimation of a Solar Cell Voltage in a Module using Modulated Light and a Phase Detector", IEEJ TRANSACTIONS ON POWER AND ENERGY, vol. 138, no. 1, 1 January 2018 (2018-01-01), pages 45 - 52, XP055717816
KOBAYASHI, YASUYUKI ET AL.: "Contactless Estimation of a Solar Cell Voltage in a Module Using Modulated Light and a Phase Detector", ELECTRICAL ENGINEERING IN JAPAN, vol. 204, no. 2, 1 March 2018 (2018-03-01), pages 3 - 12, XP055717816
KOHEI TAKABASANSHIRO YAMANAKAYASUHIRO AOYAMAYUKI NISHITOHIROSHI KOBAYASHI: "Study on heat generation in cells of PV module", PROCEEDINGS OF JSES / JWEA JOINT CONFERENCE, 2016, pages 315 - 318
See also references of EP 3896846A4
KOBAYASHI, YASUYUKI ET AL.: "Contactless Estimation of a Solar Cell Voltage in a Module Using Modulated Light and a Phase Detector", ELECTRICAL ENGINEERING IN JAPAN, vol. 204, no. 2, 1 March 2018 (2018-03-01), pages 3 - 12, XP055717816
KOHEI TAKABASANSHIRO YAMANAKAYASUHIRO AOYAMAYUKI NISHITOHIROSHI KOBAYASHI: "Study on heat generation in cells of PV module", PROCEEDINGS OF JSES / JWEA JOINT CONFERENCE, 2016, pages 315 - 318
See also references of EP 3896846A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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