| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery device and an abnormality detection method for the secondary battery device.SOLUTION: A secondary battery device comprises: battery units; a measurement section; an internal resistance calculation section; an accumulation section; and a monitoring section. The battery unit houses a plurality of battery cells. The measurement section measures a charging/discharging current, a voltage, a charging rate and a temperature for each battery cell of the battery unit. The accumulation section accumulates an internal resistance of each battery cell calculated by the internal resistance calculation section for each measurement condition of the charging rate and the temperature. The monitoring section reads the internal resistance accumulated in the accumulation section in order of time series for each battery cell, and detects a battery cell in which a change of the internal resistance for each battery cell is separated by a fixed value or above from a change of the whole battery cell as an abnormal cell. |
