Patent US10252627

On board charger input current limit setting based on AC input circuit voltage response
[+] Show Details

US10252627

1. An electric vehicle charging system comprising: (6) (3)

an interface configured to: receive power from an electric vehicle charging station;

a power convertor configured to convert the power to a battery chargeable power supply; and

a controller in communication with the interface and the power convertor, wherein the controller is configured to: supply the battery chargeable power supply to a battery;

monitor the power received from the electric vehicle charging station;

determine whether a change in voltage of the power received from the electric vehicle charging station is greater than a predetermined voltage change limit;

when the change in voltage is determined to be greater than the predetermined voltage change limit, adjust a maximum current limit to a predetermined lower current limit value;

control a current within the electric vehicle charging system to be below the predetermined lower current limit value;

determine whether a current from the power received from the electric vehicle charging station is greater than the maximum current limit;

when the current of the power is determined to be greater than the maximum current limit, adjust the current limit to a predetermined lower current limit value; and

control the current within the electric vehicle charging system to be below the predetermined lower current limit value.

2. The electric vehicle charging system of claim 1, wherein the controller is further configured to: (0) (1)

3. The electric vehicle charging system of claim 1, wherein the interface is further configured to: (1) (2)

5. The electric vehicle charging system of claim 1, wherein the predetermined voltage change limit is a voltage drop range between 3-5%. (0)

6. The electric vehicle charging system of claim 1, wherein the controller is configured to control the current within the electric vehicle charging system by adjusting an electronic characteristic of the electric vehicle charging system. (0)

7. The electric vehicle charging system of claim 1, wherein the controller is configured to control the current within the electric vehicle charging system by transmitting, through the interface, a request to lower a current in the power supplied from the electric vehicle charging station. (1) (0)

9. The electric vehicle charging system of claim 1, wherein the electric vehicle charging station is configured to monitor a voltage of the power transmitted to the interface, and reduce the maximum current limit to the predetermined lower current limit value when a change in voltage of the power transmitted to the interface is determined to be greater than the predetermined voltage change limit. (0)

10. An electric vehicle charging method comprising: (6) (9)

receiving, through an interface, power from an electric vehicle charging station;

supplying the power to a battery;

monitoring, by a controller, the power received from the electric vehicle charging station;

determining, by the controller, whether a change in voltage of the power received from the electric vehicle charging station is greater than a predetermined voltage change limit;

when the change in voltage is determined to be greater than the predetermined voltage change limit, adjusting, by the controller, a maximum current limit to a predetermined lower current limit value;

controlling, by the controller, a current within an on board charger to be below the predetermined lower current limit value;

determining whether a current from the power received from the electric vehicle charging station is greater than the maximum current limit;

when the current of the power is determined to be greater than the maximum current limit, adjusting the current limit to a predetermined lower current limit value; and

controlling the current within the on board charger to be below the predetermined lower current limit value.

11. The method of claim 10, further comprising: (0) (1)

12. The method of claim 10, further comprising: (1) (2)

14. The method of claim 10, wherein the predetermined voltage change limit is a voltage drop range between 3-5%. (0)

15. The method of claim 10, wherein controlling the current within the on board charger comprises adjusting an electronic characteristic of the on board charger. (0)

16. The method of claim 10, wherein controlling the current within the on board charger comprises transmitting, through an interface, a request to lower a current in the power supplied from the electric vehicle charging station. (1) (0)

18. The method of claim 10, further comprising: (0) (1)

View Abstract and Specification Size

PDF with Images and Document Face >

Full Text Publication >

Patent US10252627

On board charger input current limit setting based on AC input circuit voltage response

Patent Matrix® Search