US Patent 7890228 Power source monitoring system for AGVs and method

An automatic guided vehicle (AGV) and method has at least one AGV with a drive assembly, a rechargeable power source on-board the AGV configured to supply power to the drive assembly, and a controller on-board the AGV. The controller on-board the AGV is configured to substantially continuously monitor at least two conditions including an operating condition of the AGV, a state of charge of the power source, and an electrical power supplied for recharging the rechargeable power source, wherein the controller determines when the rechargeable power source of the AGV is to be recharged, and controls a recharging process of the power source based upon at least one of the monitored conditions.