Method and apparatus for estimating state of battery

An apparatus for estimating a state of a battery, the apparatus comprising:

• a sensor configured to sense data corresponding to batteries of a battery pack in an update period;
• a head-up display (HUD);
• and
• a processor comprising:
• a comparator configured to determine, in another update period prior to the update period, a maximum battery of the batteries having a maximum state information and a minimum battery of the batteries having a minimum state information,
• a selector configured to selectively transmit the data corresponding to each battery of the battery pack to a plurality of estimators,
• a first estimator of the plurality of estimators being configured to determine state information of the maximum battery based on sensing data of the maximum battery and a first battery model,
• a second estimator of the plurality of estimators being configured to determine state information of the minimum battery based on sensing data of the minimum battery and a second battery model,
• a third estimator of the plurality of estimators being configured to
• select, in a switching period of the update period, a target battery from remaining batteries, the remaining batteries being the batteries other than the maximum battery and the maximum battery,
• determine, in the switching period, state information of the target battery based on sensing data of the target battery and a third battery model, and
• determine, in the switching period, state information of the remaining batteries other than the target battery based on state information of the remaining batteries other than the target battery for another switching period that is prior to the switching period and a state change amount,
• wherein the processor is configured to output the state information of the maximum battery, the state information of the minimum battery, the state information of the maximum battery, and the state information of remaining batteries through the head-up display (HUD).