Patent ID: 9211800
Filing Date: 2015-12-15
Classification: B60L,H01M,H02H,H02J,Y02E,Y02T

Abstract:
1. A battery system comprising: a first battery and a second battery, each of the batteries performing charge and discharge; a first relay that is connected in series with the first battery and switched between an ON state in which the charge and discharge of the first battery are allowed and an OFF state in which the charge and discharge of the first battery are prohibited; a second relay that is connected in series with the second battery and switched between an ON state in which the charge and discharge of the second battery are allowed and an OFF state in which the charge and discharge of the second battery are prohibited; and a controller controlling the ON state and the OFF state of each of the first relay and the second relay, wherein a group of the first battery and the first relay and a group of the second battery and the second relay are connected in parallel with respect to a motor generator that receives an electric energy from each of the first and second batteries to generate a kinetic energy for running of a vehicle, and the controller selects a first case and a second case when the first and second relays are switched to the ON state to connect the first and second batteries to the motor generator, the first case where the second relay is switched to the ON state after switching the first relay to the ON state, the second case where the first relay is switched to the ON state after switching the second relay to the ON state.