Outrush Current Control by Hot Swap Controller for Battery Protection in Electrical Vehicle

This paper focuses on problem-solving for large outrush current from DC power supply to capacitive load in an electric vehicle. This outrush current occurs during a pre-charge state of traction battery to cause high spike peak and consequently damage the main switching contact and the battery cell. In this paper the current control to gradually increase the outrush current by hot swap controller was proposed. The responses of the proposed control and the classical control were compared and investigated. With the proposed control technique, the impact of harmful outrush current can be reduced. As a result, the hot swap controller gave satisfactory responses and provided good stability.