BATTERY DRIVING TYPE INFORMATION PROCESSOR, BATTERY POWER SOURCE SYSTEM AND BATTERY MANAGING DEVICE

摘要

PURPOSE:To execute a prediction management of the battery capacity of a type in which the variation of a terminal voltage is generated in the end of a discharge service life of a battery by calculating the charge capacity and the consumption capacity by a battery managing part, and calculating the residual capacity of the battery from both of them. CONSTITUTION:A CPU 22 converts a timer interruption time interval to the consumption capacity by referring to the average consumption current of a battery from a program memory 14. Subsequently, a detecting part 23 detects a state of a charging circuit, and when charging is being executed, the charge capacity and the saturation charge capacity are referred to and compared from a backup memory 24 and a program memory, respectively. When the saturation cap a city is larger, an interruption time interval is converted to the charge capacity as normal change, and next, the charge capacity of the memory 24 is updated by a prescribed calculation. On the other hand, when charging is not being executed, the converted consumption capacity is calculated, and the charge capacity of the memory 24 is updated. Next, a necessary charge time is calculated and displayed up to the saturation capacity, and when a battery reaches the saturation capacity, the accumulation of an error caused by use for many hours is brought to correction processing. As a result, a charge capacity value of the memory 24 is always updated to the latest charge capacity value.