Remaining stored power amount estimation device, method for estimating remaining stored power amount of storage battery, and computer program

A method for estimating a remaining stored power amount of a storage battery, the method comprising:

• an observation step of observing a state of the storage battery;
• and
• an estimation step of, on the basis of a state vector and an observation vector, updating the state vector using a Kalman filter and estimating the remaining stored power amount of the storage battery, the state vector representing the state of the storage battery on the basis of an equivalent circuit modeling the storage battery, the observation vector representing an observed value based on a result of observation in the observation step, wherein
• in the estimation step, an internal impedance of the storage battery modeled by the equivalent circuit is changed in accordance with a value influencing the internal impedance.

A computer program for causing a computer to execute a process for estimating a remaining stored power amount of a storage battery, the computer program causing the computer to execute:

• an observation step of observing a state of the storage battery;
• and
• an estimation step of, on the basis of a state vector and an observation vector, updating the state vector using a Kalman filter and estimating the remaining stored power amount of the storage battery, the state vector representing the state of the storage battery by a plurality of elements included in an equivalent circuit modeling the storage battery, the observation vector representing an observed value based on a result of observation in the observation step, wherein
• in the estimation step, an internal impedance of the storage battery modeled by the equivalent circuit is changed in accordance with a value influencing the internal impedance.