Patent ID: 8942075
Filing Date: 2015-01-27
Classification: G11B,H02J

Abstract:
1. A battery management device, comprising: a charging circuit to charge a secondary battery; a discharging circuit to discharge the secondary battery; a path switching circuit including a function to switchably connect no smaller than three secondary batteries to be managed with one of the charging circuit and the discharging circuit separately, and a function to connect a plurality of the secondary batteries selected as a power source among the secondary batteries to be managed such that the secondary batteries selected as a power source are in a specific connection state; an information collection unit to collect at least one of information indicating a charging situation about the secondary battery connected to the charging circuit via the path switching circuit, and information indicating a discharging situation about the secondary battery connected to the discharging circuit via the path switching circuit as battery status information; and a controller to calculate a degradation state of each of the secondary batteries as a management objects based on the battery status information, and manage each of the secondary batteries as management objects based on the calculated degradation state, wherein the controller includes: a function to select the plurality of the secondary batteries as the power source by using the degradation state, a reorganization function to make one of the secondary batteries not selected as the power source be a new power source as substitute for one of the secondary batteries selected based on the degradation state among the secondary batteries having been selected as the power source, a refreshing function to activate the secondary battery having been disconnected from the power source by the reorganization function using the discharging circuit and the charging circuit, and a function to control the path switching circuit according to a prescribed control procedure.