Abstract: A state of charge estimation apparatus that estimates a state of charge of a secondary battery includes a processor and associated memory configured to: obtain a voltage measurement value, a current measurement value, and a temperature measurement value of the second battery; calculate a state of charge estimation value of the secondary battery based on the current measurement value; determine whether or not the voltage measurement value of the secondary battery has reached a predetermined voltage threshold during charge or discharge of the secondary battery; and in a case where the voltage measurement value of the secondary battery is determined to have reached the voltage threshold, correct the state of charge estimation value based on the current measurement value and the temperature measurement value that are obtained at a correction time point at which the voltage measurement value of the secondary battery has reached the voltage threshold.

Abstract: A current detection apparatus includes a microcomputer. The microcomputer is configured to: detect a first current by using a first current sensor having a first current detection range; detect a second current by using a second current sensor having a smaller current detection error with respect to temperature change than the first current sensor and having a second current detection range different from the first current detection range and partially overlapping the first current detection range; calculate a correction value based on the second current that has been detected in a range in which the first current detection range and the second current detection range overlap with each other, and correct the first current by the correction value when using the first current for a detection current to be detected.

Abstract: A power steering apparatus control device is provided with target rotation speed setting means, motor control means, and processing means. The target rotation speed setting means sets the target rotation speed of the electric motor base on the vehicle speed and the angular speed of the steering wheel. The motor control means controls the rotation speed of the electric motor to become the target rotation speed. The processing means detects an end contact state in which steering force is applied although the steering wheel reaches a mechanical operation limit when the drive load of the electric motor exceeds a threshold load and the time period when the state in which the steering angular speed is lower than a threshold angular speed is established reaches a threshold time period, and performs a protection operation for preventing the target rotation speed setting means from increasing the target rotation speed.