초록 ▼

A remaining battery capacity measuring apparatus comprises: a voltage-current change trend calculating section (21) for detecting dispersive terminal voltages and discharge currents of a battery; a voltage-current approximate linear function calculating section (25) for calculating an approximate li

A remaining battery capacity measuring apparatus comprises: a voltage-current change trend calculating section (21) for detecting dispersive terminal voltages and discharge currents of a battery; a voltage-current approximate linear function calculating section (25) for calculating an approximate linear function indicative of a trend of the detected dispersive terminal voltages and discharge currents; a correlation coefficient calculating section (28) for calculating a correlation coefficient between the detected dispersive terminal voltages and discharge currents; a correlation coefficient deciding section (29) for deciding whether the calculated correlation coefficient less than a negative reference value can be calculated continuously or not, and for enabling the voltage-current approximate linear function calculating section (25) to output the calculated approximate linear function, only when the correlation coefficient less than the negative reference value can be calculated continuously; and a remaining battery capacity calculating section (23) for calculating a remaining battery capacity on the basis of a terminal voltage corresponding to a reference discharge current along the outputted approximate linear function.

대표청구항 ▼

A remaining battery capacity measuring method, comprising the steps of: sampling dispersive terminal voltages and dispersive discharge currents of a battery connected to a fluctuating load; calculating an approximate linear function indicative of a trend of the sampled dispersive terminal voltages a

A remaining battery capacity measuring method, comprising the steps of: sampling dispersive terminal voltages and dispersive discharge currents of a battery connected to a fluctuating load; calculating an approximate linear function indicative of a trend of the sampled dispersive terminal voltages and the sampled dispersive discharge currents; calculating a correlation coefficient between the sampled dispersive terminal voltages and the sampled dispersive discharge currents; comparing the calculated correlation coefficient with a negative reference value, to discriminate whether the calculated correlation coefficient indicates a strong correlation or not; discriminating whether the strong correlation is calculated repeatedly by a predetermine number of times or not; calculating a remaining battery capacity on the basis of a sampled terminal voltage corresponding to a reference discharge current and in accordance with the calculated approximate linear function, only when the strong correlation is calculated repeatedly by the predetermined number of times; and repeating the above-mentioned steps to update the calculated remaining battery capacity for each predetermined time interval.