Patent ID: 8803482

Claim:
A nonaqueous electrolyte type secondary battery system comprising: a nonaqueous electrolyte type secondary battery; and a control part programmed to control the nonaqueous electrolyte type secondary battery, wherein the control part includes: a charge and discharge hysteresis value calculating part programmed to calculate, at predetermined time intervals, a charge hysteresis value Cc representing a history of charge with a current exceeding a predetermined charge threshold current Ic, and a discharge hysteresis value Cd representing a history of discharge with a current exceeding a predetermined discharge threshold current Id; and a current limiting part programmed to limit the charge current or the discharge current after a difference between the charge hysteresis value Cc and the discharge hysteresis value Cd is determined to be larger than a predetermined degree, the current limiting part is programmed to: limit the charge current when the charge hysteresis value Cc is larger than the discharge hysteresis value Cd, and limit the discharge current when the charge hysteresis value Cc is smaller than the discharge hysteresis value Cd.