Patent ID: 9136726
Filing Date: 2015-09-15
Classification: B60L,H01M,H02J,Y02E,Y02T

Abstract:
1. A battery system for a movable object on which the battery system is mounted and which comprises a charger and a load unit including a travel load electrically driven for traveling the movable object and a work load electrically driven for performing an operation other than traveling the movable object, the battery system comprising: a plurality of battery packs formed by connecting a plurality of secondary cells in series or in parallel; a power control circuit for changing a connection state between the plurality of battery packs and the charger and a connection state between the plurality of battery packs and the load unit; a memory for storing in advance operation information about operation patterns including an operation cycle including a travel cycle for traveling and stopping the movable object by the travel load and a work cycle for driving and stopping the work load and chargeability/non-chargeability that is set in accordance with the operation cycle; and an estimation unit for estimating a power consumption pattern in the travel and work cycles based on the operation information stored in the memory, wherein the power control circuit controls changing of the connection state between the plurality of battery packs and the load unit based on the power consumption pattern estimated by the estimation unit and the operation information stored in the memory, so as to control changing of a state of each of the plurality of battery packs among a charge state, a discharge state and a stand-by state to cover the power consumption of the load unit, the battery pack not being charged or discharged in the stand-by state.