Discharge ability estimating system, control system in vehicle incorporating discharge ability estimating system, and discharge ability estimating method

摘要

There is provided a discharge ability estimating system for estimating a discharge ability of a battery for supplying electric power to an electric motor which rotates a crankshaft of an engine to start the engine, the system being configured to estimate the discharge ability of a battery based on an angular acceleration state of the crankshaft in a rotation starting period of the crankshaft.

主权项

1. A discharge ability estimating device for estimating dischargeable current which is dischargeable from a battery for supplying electric power to an electric motor which rotates a crankshaft of an engine to start the engine, the discharge ability estimating device comprising:
a sensor for detecting a rotational angle of the crankshaft; and a controller for calculating an angular acceleration of the crankshaft in a rotation starting period of the crankshaft based on the rotational angle detected by the sensor, and for estimating the dischargeable current of the battery based on the angular acceleration.