| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery life deterioration estimation device capable of detecting in advance a rapid deterioration of the life performance of a nonaqueous electrolyte secondary battery. SOLUTION: A battery life deterioration estimation device 100 used for estimating a state of a rapid deterioration of a battery capacity as a state of deterioration in life includes: a first acquisition part 110 for acquiring a value obtained from an electricity quantity corresponding to each of plural potential flat portions appearing in an anode potential property at a first temporal point; a second acquisition part 120 for acquiring a value obtained from an electricity quantity corresponding to each of plural potential flat portions appearing in a battery voltage property at a second temporal point; a calculation part 130 for calculating a reversible capacity estimation value represented by an anode potential property at the second temporal point using the acquired values; and a life determination part 140 for determining as a life being deteriorated if a value produced by subtracting a value representing an electricity quantity corresponding to the reversible capacity represented by a battery voltage property at the second temporal point from the reversible capacity estimation value is lower than a predetermined threshold. COPYRIGHT: (C)2013,JPO&INPIT |
