Storage battery internal resistance online estimation method, system and device and storage medium

• Main Authors: YANG JIANBO, LAI BAOPENG, ZHANG TAO, CHENG YUKAI, SHEN WENMING, ZENG ZHEN, LIN YABIN
• Format: Patent
• Language: Chinese; English
• Published: 24.06.2022
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention relates to a storage battery internal resistance online estimation method, system and device and a storage medium, and the method specifically comprises the steps: connecting an AC voltage source in a storage battery loop in series, and the storage battery loop comprises a charger and a plurality of storage batteries connected in series; sampling the current of the storage battery loop connected in series with the AC voltage source and the voltage at the two ends of the storage battery to be measured, and filtering the DC component to obtain the AC component of the current of the storage battery loop and the AC component of the voltage at the two ends of the storage battery to be measured; acquiring the maximum current value and the minimum current value of the alternating current component of the loop current of the storage battery within given sampling time, and acquiring corresponding moments when the maximum current value and the minimum current value appear; and reading two corresponding vo