Information processing apparatus, control method, and program

1. An information processing apparatus, comprising:

a first differential voltage acquisition unit acquiring, for each of a plurality of battery cells connected in series, a first differential voltage which is a difference between a voltage after charging is completed and a voltage at a time when an operation is performed for a predetermined time after charging is completed; and

a determination unit determining that an abnormality occurs in a first battery cell, in a case where a difference between the first differential voltage of the first battery cell and the first differential voltage of a second battery cell is greater than or equal to a first predetermined value, the second battery cell having a next largest first differential voltage to the first battery cell.

2. The information processing apparatus according to claim 1 , wherein the first battery cell is the battery cell having a largest first differential voltage.

3. The information processing apparatus according to claim 1 , wherein, in a case where it is determined that an abnormality occurs in the first battery cell, the determination unit determines that abnormalities also occur in other battery cells having the first differential voltage larger than the first differential voltage of the first battery cell.

4. The information processing apparatus according to claim 1 , further comprising a frequency index value acquisition unit acquiring a frequency index value representing an operation frequency of a cell balance circuit that controls the battery cell,

wherein the determination unit determines that an abnormality occurs in the first battery cell, in a case where a difference between the first differential voltage of the first battery cell and the first differential voltage of the second battery cell having the next largest first differential voltage of the first battery cell is greater than or equal to the first predetermined value, and the operation frequency of the cell balance circuit that controls the first battery cell is greater than or equal to a predetermined frequency.

5. The information processing apparatus according to claim 4 , further comprising a second differential voltage acquisition unit acquiring, for each of the battery cells, a second differential voltage which is a difference between a voltage after charging is completed and a voltage after discharging is completed,

wherein the determination unit determines that a follow-up observation of the first battery cell is necessary, in a case where a difference between the first differential voltage of the first battery cell and the first differential voltage of the second battery cell having the next largest first differential voltage of the first battery cell is greater than or equal to the first predetermined value, the operation frequency of the cell balance circuit that controls the first battery cell is less than the predetermined frequency, and the second differential voltage of the first battery cell is greater than or equal to a second predetermined value.

6. A control method executed by a computer, the method comprising:

acquiring, for each of a plurality of battery cells connected in series, a first differential voltage which is a difference between a voltage after charging is completed and a voltage at a time when an operation is performed for a predetermined time after charging is completed; and

determining that an abnormality occurs in a first battery cell, in a case where a difference between the first differential voltage of the first battery cell and the first differential voltage of a second battery cell is greater than or equal to a first predetermined value, the second battery cell having a next largest first differential voltage of the first battery cell.

7. The control method according to claim 6 , wherein the first battery cell is the battery cell having a largest first differential voltage.

8. The control method according to claim 6 , wherein, in a case where it is determined that an abnormality occurs in the first battery cell, determining that abnormalities also occur in the other battery cells having the first differential voltage larger than the first differential voltage of the first battery cell.

9. The control method according to claim 6 , further comprising acquiring a frequency index value representing an operation frequency of a cell balance circuit that controls the battery cell,

wherein determining that an abnormality occurs in the first battery cell, in a case where a difference between the first differential voltage of the first battery cell and the first differential voltage of the second battery cell having the next largest first differential voltage of the first battery cell is greater than or equal to the first predetermined value, and the operation frequency of the cell balance circuit that controls the first battery cell is greater than or equal to a predetermined frequency.

10. The control method according to claim 9 , further comprising acquiring, for each of the battery cells, a second differential voltage which is a difference between a voltage after charging is completed and a voltage after discharging is completed,

wherein determining that a follow-up observation of the first battery cell is necessary, in a case where a difference between the first differential voltage of the first battery cell and the first differential voltage of the second battery cell having the next largest first differential voltage of the first battery cell is greater than or equal to the first predetermined value, the operation frequency of the cell balance circuit that controls the first battery cell is less than the predetermined frequency, and the second differential voltage of the first battery cell is greater than or equal to a second predetermined value.

11. A non-transitory computer-readable storage medium comprising a program causing a computer to execute each step of the control method according to claim 6 .