Patent ID: 6311080
Filing Date: 2001-10-30
Classification: G01R,H02J

Abstract:
A method for detecting a full charge state of a battery during a charging operation, comprising the steps of:obtaining a first data series including first to N-th data items, where N is a predetermined positive integer not less than 2, the first to N-th data items of the first data series corresponding to battery voltages measured at first sampling intervals during a first sampling time period, respectively;obtaining a second data series including first to N-th data items, the first to N-th data items of the second data series corresponding to battery voltages measured at second sampling intervals during a second sampling time period, respectively, a predetermined time delay being provided between a beginning of the first sampling time period and a beginning of the second sampling time period, the second sampling intervals being the same as the first sampling intervals;comparing an i-th data item of the first data series and an i-th data item of the second data series to obtain a number of times that the i-th data item of the second data series is smaller than the i-th data item of the first data series, where i=1, 2, . . . , N; andjudging whether or not the battery has reached the full charge state on the basis of a ratio of the number of times to N.