Nonaqueous electrolyte type secondary battery system and vehicle

A vehicle comprising:

• a motor;
• 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.

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 salt concentration estimating part programmed to estimate a salt concentration distribution in an electrolyte of the nonaqueous electrolyte type secondary battery based on the charge hysteresis value Cc and the discharge hysteresis value Cd.

A vehicle comprising:

• a motor;
• 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 salt concentration estimating part programmed to estimate a salt concentration distribution in an electrolyte of the nonaqueous electrolyte type secondary battery based on the charge hysteresis value Cc and the discharge hysteresis value Cd.