Patent ID: 8471403

Claim:
Power supply arrangement of a transport system, comprising: a motor for moving the transport appliance; a power supply circuit of the transport system, for supplying power between a power source of the transport system and the motor; a power controller of the energy storage, including at least one controllable switch an energy storage connected via the power controller of the energy storage to the power supply circuit of the transport system; and a power control configured to control the at least one controllable switch of the power controller to adjust a direction and electrical magnitude of the power supplied between the power supply circuit of the transport system and the energy storage, wherein when the direction of the power is from the energy storage to the power supply circuit, the power control limits the discharge power of the energy storage to a set limit value (Plim), and the power control is further configured to: determine the voltage of the energy storage (UE); and determine the instantaneous limit value (Ilim) for the discharge current of the energy storage on the basis of the quotient ( I lim = P lim U E ) between the set power limit value (Plim) and the voltage of the energy storage (UE).