BATTERY COOLING STATE DETERMINATION DEVICE, ELECTRIC VEHICLE AND BATTERY COOLING STATE DETERMINATION METHOD

摘要

PROBLEM TO BE SOLVED: To provide: a battery internal state estimation device capable of highly accurately and simply determining whether a battery is properly cooled while suppressing an operation load from increasing; and the like.SOLUTION: When it has been determined that an abnormality occurs in a battery (11) (S4 is No), it is determined whether the abnormality has been caused due to a failure of a cooling device (30) by adjusting a cooling amount in a cooling device (30) cooling the battery (S6) and comparing an actual temperature distribution Sexp3 inside the battery which is detected after the battery has been cooled at an adjusted cooling amount for a predetermined time with an actual temperature distribution Sexp2 that has been detected before cooling amount adjustment.SELECTED DRAWING: Figure 4