SEMICONDUCTOR DEVICE, BATTERY PACK, AND ELECTRONIC DEVICE

摘要

A semiconductor device generates battery state information including information of a capacity that can be extracted from a battery in the case of discharging from a full charge state until a discharge cutoff voltage at a predetermined discharge rate, based on measurement results of battery voltage, current, and temperature. The device calculates a first estimate value of capacity that can be extracted in the case of discharging the battery from the full charge state until the discharge cutoff voltage and calculates a second estimate value of capacity that can be extracted in the case of discharging the battery until a voltage larger than the discharge cutoff voltage. The device corrects the first estimate value based on a difference between a capacity value extracted from the battery by discharging the battery from the full charge state until the voltage larger than the discharge cutoff voltage and the second estimate value.

主权项

1. A semiconductor device for monitoring a state of a battery, the semiconductor device comprising:
a voltage measurement unit for measuring a voltage of the battery; a current measurement unit for measuring a current of the battery; and a data processing control unit for generating state information indicating the state of the battery, based on measurement results of the voltage measurement unit and the current measurement unit, wherein the data processing control unit calculates a first estimate value of a capacity that can be extracted from the battery in the case of discharging the battery from a full charge state until a discharge cutoff voltage at a predetermined discharge rate and a second estimate value of a capacity that can be extracted from the battery in the case of discharging the battery until a voltage larger than the discharge cutoff voltage, and corrects the first estimate value based on an error in the second estimate value, wherein the error in the second estimate value is determined based on a difference amount between a capacity value extracted from the battery by discharging the battery from the full charge state until the voltage larger than the discharge cutoff voltage and the second estimate value.