BATTERY DIAGNOSIS METHOD AND BATTERY DIAGNOSIS DEVICE

• Main Authors: KONO TORU, FUJII NAOYUKI, NAGAYAMA YUICHI, KONDO KATSUTOSHI, BAMBA KOTA, ASANO MINORU
• Format: Patent
• Language: English; Japanese
• Published: 02.08.2022
• 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

To provide a technique capable of grasping with sufficient accuracy the remaining life of a solar battery, even when the calculation accuracy of shunt resistance is insufficient.SOLUTION: A battery diagnosis method of the present invention discriminates a first period when shunt resistance drops with a first drop rate from a second period when it drops with a second drop rate larger than the first drop rate, and estimates the remaining life of a solar battery by calculating the time required for the deterioration state of the solar battery to reach a reference value from the second period or a period after the second period.SELECTED DRAWING: Figure 8 【課題】シャント抵抗の計算精度が不十分である場合においても、太陽電池の余寿命を十分な精度で把握することができる技術を提供する。【解決手段】本発明に係る電池診断方法は、シャント抵抗が第１低下率で低下する第１期間と、前記第１低下率よりも大きい第２低下率で低下する第２期間とを識別し、前記第２期間または前記第２期間よりも後の期間から、前記太陽電池の劣化状態が基準値に達するまでに要する時間を算出することにより、前記太陽電池の余寿命を推定する。【選択図】図８