Conveyance carrier

The invention relates to conveyance carrier, which is driven by electric power to deliver cargoes. Under the situation that a driving device (22) for travelling does not receive electric power from anelectricity receiving device (24) taken as a main power supply, the driving device (22) utilizes electric power stored in an electricity storage device (26) to carry out driving. A voltage converter(30), which carries out voltage conversion among the driving device (22), the electricity receiving device (24), and the electricity storage device (26), is used to monitor the accumulation voltage (VB) output by the electricity storage device (26). During the period when the voltage converter (30) is taken as a voltage booster to carry out operations, when the accumulation voltage (VB) is lower than a predetermined lower limit of voltage, the connection between the voltage converter (30) taken as a voltage booster and the electricity storage device (26) is cut off. 本发明涉及种输送台车，其利用电力进行行驶而对物品进行输送。在用于行驶的驱动装置(22)未接受到从作为主电源