Battery Management Device And Operation Method Therefor

Abstract: A battery management device, according to one embodiment disclosed in the present document, may comprise: an information acquisition unit for acquiring open-circuit voltages of a plurality of battery cells; and a controller which calculates first voltages of the plurality of battery cells related to a change in the open-circuit voltages of the plurality of battery cells during a preset period of time, calculates a second voltage which is the average of the first voltages of the plurality of battery cells, calculates a deviation on the basis of the first voltages of the plurality of battery cells and the second voltage, and diagnoses the plurality of battery cells on the basis of a ratio between the first voltages of the plurality of battery cells and the second voltage and the deviation.

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