Power supply device supplying power to multiple carts, cart, and method for charging cart

1. A power supply device for supplying power to multiple carts, the power supply device comprising:

a communicator that receives information on a charge demand from one or more electrically connected carts;

a controller that calculates a charge allocation of the electrically connected carts based on priorities of the electrically connected carts; and

a power supply that supplies power to a physically connected cart,

wherein the communicator transmits, to the electrically connected carts, information on the charge allocation of the electrically connected carts, and

wherein the controller calculates a number of carts capable of full charge (FULL_CHARGING_CART_NUM) based on an electric capacity of the power supply device and a battery capacity of the electrically connected carts, and when a number of uncharged carts is smaller than the FULL_CHARGING_CART_NUM, then the controller sets a maximum current amount for all uncharged carts without determining the priorities of the electrically connected carts.

2. The power supply device for supplying the power to the multiple carts of claim 1 , wherein the controller determines the priorities of the electrically connected carts based on the charge demand of the electrically connected carts and calculates the charge allocation of the electrically connected carts.

3. The power supply device for supplying the power to the multiple carts of claim 1 , wherein the controller determines the priorities of the electrically connected carts based on connection sequence information related to the electrically connected carts and calculates the charge allocation of the electrically connected carts.

4. The power supply device for supplying the power to the multiple carts of claim 3 ,

wherein the controller increases and sets the connection sequence based on a sequence in which the electrically connected carts are connected to the power supply device, and

wherein the controller increases the charge allocation to be supplied to an electrically connected cart as the electrically connected cart has a greater connection sequence to the power supply device.

5. The power supply device for supplying the power to the multiple carts of claim 1 ,

wherein a database stores identification information related to each of the electrically connected carts and a charging time of each of the electrically connected carts, and

wherein the controller determines the priorities of the electrically connected carts based on the charging time of each of the electrically connected carts and calculates the charge allocation of the electrically connected carts.

6. The power supply device for supplying the power to the multiple carts of claim 1 ,

wherein the controller calculates an expected charging time of each of the electrically connected carts based on the charge allocation to be allocated to each of the electrically connected carts, and

wherein the communicator transmits, to the electrically connected carts, information on the expected charging time.

7. The power supply device for supplying the power to the multiple carts of claim 1 ,

wherein the communicator receives a message requesting a rapid charging from any one of the electrically connected carts, and

wherein the controller changes the priorities of the electrically connected carts to allocate a maximum charge allocation to the cart that has sent the message.

8. The power supply device for supplying the power to the multiple carts of claim 1 ,

wherein the controller monitors a connection or a separation of the electrically connected carts or changes in a charging state of the electrically connected carts disposed in N numbers of charging rows connected to N numbers of power connectors, and

wherein the controller generates a message indicating that charging electrically connected carts in M numbers of charging rows, among the N numbers of charging rows, is completed and the communicator transmits the message to the electrically connected carts.

9. A method for supplying, by a power supply device, power to multiple carts, the method comprising:

receiving, by a communicator, charge demand information from one or more electrically connected carts;

calculating, by a controller, a charge allocation of the electrically connected carts based on priorities of the electrically connected carts;

transmitting, by the communicator, information on the charge allocation of each of the electrically connected carts to the electrically connected carts; and

supplying, by the power supply, power to a physically connected cart,

wherein the controller calculates a number of carts capable of full charge (FULL_CHARGING_CART_NUM) based on an electric capacity of the power supply device and a battery capacity of the electrically connected carts, and when a number of uncharged carts is smaller than the FULL_CHARGING_CART_NUM, then the controller sets a maximum current amount for all uncharged carts without determining the priorities of the electrically connected carts.

10. The method for supplying, by the power supply device, the power to the multiple carts of claim 9 , wherein the calculating the charge allocation of the electrically connected carts further comprises determining, by the controller, the priorities of the electrically connected carts based on the charge demand of the electrically connected carts and calculating the charge allocation of the electrically connected carts.

11. The method for supplying, by the power supply device, the power to the multiple carts of claim 9 , wherein the charge allocation of the electrically connected carts is calculated by determining, by the controller, the priorities of the electrically connected carts based on information on connection sequences of the electrically connected carts.

12. The method for supplying, by the power supply device, the power to the multiple carts of claim 11 , the method further comprising:

increasing and setting, by the controller, the connection sequences of the electrically connected carts based on a sequence in which the electrically connected carts are connected to the power supply device; and

increasing, by the controller, the charge allocation to be supplied to an electrically connected cart as the electrically connected cart has a higher connection sequence with respect to the power supply device.

13. The method for supplying, by the power supply device, the power to the multiple carts of claim 9 , the method further comprising:

storing, by a database, identification information related to each of the electrically connected carts and a charging time of each of the electrically connected carts; and

determining, by the controller, the priorities of the electrically connected carts based on the charging time of each of the electrically connected carts and calculating the charge allocation of the electrically connected carts.

14. The method for supplying, by the power supply device, the power to the multiple carts of claim 9 , the method further comprising:

calculating, by the controller, an expected charging time of each of the electrically connected carts based on the charge allocation to be allocated to each of the electrically connected carts; and

transmitting, by the controller, information on the expected charging time to the electrically connected carts.

15. The method for supplying, by the power supply device, the power to the multiple carts of claim 9 , the method further comprising:

monitoring, by the controller, a connection or a separation or changes in a charging state of the electrically connected carts in N numbers of charging rows connected to N numbers of power connectors;

generating, by the controller, a message indicating that charging electrically connected carts in M numbers of charging rows, among the N numbers of charging rows, is completed; and

transmitting, by the communicator, the message to the electrically connected carts.

16. The method for supplying, by the power supply device, the power to the multiple carts of claim 9 , the method further comprising:

receiving, by the communicator, a message requesting a rapid charging from any one of the electrically connected carts; and

changing, by the controller, the priorities of the electrically connected carts to allocate a maximum charge allocation to the cart that has sent the message.