| 摘要 |
The device for charging a secondary battery, comprises: a measuring circuit for measuring the terminal voltage of the battery; a control circuit for controlling a charging current fed through the battery; and an abnormality determining portion which starts a preliminary charging of the battery (S2), finishes the charging (S4) when the voltage of the battery has reached a first threshold value which is decided based on the normal-state upper limit of the internal resistance and the current of the battery (S3), measures the open-circuit voltage of the battery after finishing the charging, determines that the battery is abnormal when the open-circuit voltage is less than a second threshold value (S5), determines that the battery is abnormal when the open-circuit voltage is larger than a third threshold value for detecting that the battery is abnormal (S5), and indicates that the battery is abnormal (S9).
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