Failure determination apparatus and method for determining failure

A method for determining failure, comprising:

• detecting a state of an electricity storage with a state sensor;
• accumulating data including time-series states of the electricity storage as accumulated data;
• and
• determining, based on the accumulated data, whether a failure occurs in at least one of the electricity storage or the state sensor, wherein
• the electricity storage comprises a plurality of electricity storage cells,
• the state sensor detects equalizing time required to equalize storage capacity among the electricity storage cells,
• a total value of the equalizing time is detected, and
• it is determined that a failure occurs in the plurality of electricity storage cells if the total value of the equalizing time is lower than an equalization time threshold.

A failure determination apparatus comprising:

• an electricity storage;
• a state sensor to detect a state of the electricity storage;
• a data accumulator to accumulate data including time-series states of the electricity storage acquired by the state sensor as accumulated data;
• and
• a controller to determine, based on the accumulated data, whether a failure occurs in at least one of the electricity storage or the state sensor, wherein
• the state sensor measures voltage of the electricity storage as the data,
• the data accumulator accumulates a differential value between a first voltage value acquired from the electricity storage and a second voltage value acquired after the first voltage value is acquired, the data accumulator accumulating the differential value as the accumulated data,
• the controller determines, based on the differential value, which a failure occurs in at least one of the electricity storage and the state sensor, and
• the controller determines whether the failure occurs in at least one of the electricity storage or the state sensor if an absolute value of a change rate of the accumulated differential value is larger than a voltage differential threshold.

A method for determining failure, comprising:

• detecting a state of an electricity storage with a state sensor;
• accumulating data including time-series states of the electricity storage as accumulated data;
• and
• determining, based on the accumulated data, whether a failure occurs in at least one of the electricity storage or the state sensor, wherein
• the state sensor measures voltage of the electricity storage,
• a differential value between a first voltage value and a second voltage value is accumulated, the first voltage value being acquired from the electricity storage, a second voltage value being acquired later than the first voltage value, and
• it is determined whether the failure occurs in at least one of the electricity storage or the state sensor if an absolute value of a change rate of the accumulated differential value is larger than a voltage differential threshold.