Battery diagnosis apparatus and battery diagnosis method

A battery diagnosis apparatus comprising:

• a data obtaining unit configured to obtain a first target full-cell profile relating capacity and voltage of a target cell at a first electric stimulation applied to the target cell;
• and
• a control circuit configured to generate an estimated full-cell profile based on the first target full-cell profile and an overpotential profile,
• wherein the control circuit is configured to:
• determine a first performance factor group as a primary estimation result for charge/discharge performance of the target cell by applying a cell diagnosis logic to the estimated full-cell profile, and
• determine a second performance factor group as a secondary estimation result for the charge/discharge performance of the target cell by applying a factor correction model to the first performance factor group,
• wherein the second performance factor group includes an estimation result of a negative electrode loading amount of the target cell, which is determinable by applying the cell diagnosis logic to a second target full-cell profile relating capacity and voltage of the target cell at a second electric stimulation applied to the target cell, wherein the second electric stimulation is different from the first electric stimulation.