公开(公告)号：US20230160968A1

公开(公告)日：2023-05-25

申请号：US18058191

申请日：2022-11-22

Applicant: KOREA ELECTRONICS TECHNOLOGY INSTITUTE

Inventor： Junghoon Ahn ,  Sunggeun Song ,  Byungchul Park ,  Kyoochang Jeong ,  Seongmun Oh

IPC: G01R31/389 ,  G01R31/3842

CPC classification number: G01R31/389 ,  G01R31/3842

Abstract: An apparatus for measuring the internal resistance of battery cells in a variable number unit in an online state is proposed. The apparatus may include a switch array, a variable resistor, a high-speed switch, a measurement sensor, and a controller. The switch array configures a measurement target battery cell by selecting at least one battery cell from among a plurality of battery cells included in a battery module. The variable resistor is connected to the measurement target battery cell via the switch array. The high-speed switch switches a connection between the measurement target battery cell and the variable resistor. The measurement sensor detects a measurement voltage of the measurement target battery cell and a measurement current of the measurement target battery cell in an online state of the battery module. The controller derives an internal resistance of the measurement target battery cell through the measurement voltage and the measurement current.