Patent ID: 6563318
Filing Date: 2003-05-13
Classification: G01R

Abstract:
A detecting method for detecting an internal state of an inspective rechargeable battery (Ba), said internal state including a deterioration state, an electricity storable capacity, a remaining capacity, and an internal resistance of said inspective rechargeable battery (Ba),said detecting method comprising: (1) a step in which basic data (BD) of characteristics of a normal non-deteriorated rechargeable battery (Bn) as a reference rechargeable battery for said inspective rechargeable battery (Ba) are provided; and (2) a step in which for said inspective rechargeable battery (Ba), a voltage value or/and a current value thereof are measured, and the measured result is compared with said basic data (BD) obtained in said step (1) to judge: (i) the inspective rechargeable battery (Ba) is short-circuited, (ii) the internal resistance of the inspective rechargeable battery (Ba) is increased, (iii) the electricity storable capacity of the inspective rechargeable battery (Ba) is decreased, (iv) the electricity storable capacity of the rechargeable battery (Ba) is decreased and the internal resistance thereof is increased, or (v) the inspective rechargeable battery (Ba) is normal.