Battery bank unit, remaining charge time calculation method, and remaining charge time calculation program

A remaining charge time calculation method for a computer to calculate remaining time to complete charge of a battery bank unit, the charge including collective charge for collectively charging a first battery bank and a second battery bank connected in parallel to the first battery bank, first bank charge for charging only the first battery bank after the collective charge, and second bank charge for charging only the second battery bank after the first bank charge, the method comprising:

• acquiring a temperature of the battery bank unit at a start of the collective charge;
• and
• calculating the remaining time based on the temperature of the battery bank unit.

A remaining charge time calculation program stored in a non-transitory storage medium, wherein, when the program is executed by a computer that controls a battery bank unit for which collective charge for collectively charging a first battery bank and a second battery bank connected in parallel to the first battery bank is performed, first bank charge for charging only the first battery bank is performed after the collective charge, and second bank charge for charging only the second battery bank is performed after the first bank charge, the program is configured to cause the computer to perform operations comprising:

• acquiring a temperature of the battery bank unit at a start of the collective charge;
• and
• calculating remaining time to complete charge of the battery bank unit based on the temperature of the battery bank unit.