Patent ID: 11916424
Assignee: RIVIAN IP HOLDINGS, LLC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B  Y | IPC H

Claim 4:
5. A direct current fast charging (DCFC) unit comprising:
an alternating current AC-DC converter configured to generate an input DC voltage Vin in response to a received grid AC voltage;
a DC-DC converter configured to generate an output voltage Vo in response to the input voltage Vin;
a communication unit configured to receive a requested power value from an electric vehicle, the requested power value including a value chosen from a requested voltage value V* and a requested current value I*;
a controller module configured to generate control signals configured to control a charging output of the DC-DC converter responsive to the input voltage Vin and the output voltage Vo, wherein the controller module includes:
a controller; and
non-transitory computer-readable media configured to store computer-executable instructions configured to cause the controller to:
receive the input voltage Vin;
receive the output voltage Vo;
receive the requested power value from the communication unit;
generate an estimated battery current value Iest responsive to the output voltage Vo and a requested current value I*, wherein in a first mode, the requested current value I* is received by the controller, and in a second mode, the requested current value I* is determined from a received requested voltage value V*;
generate a current reference value Iref by combining the requested current value I* with the estimated battery current value Iref;
generate a control signals phase shift θ* responsive to the received input voltage Vin, the output voltage Vo, and a received requested power value P*;
wherein the control signals are further generated from the requested power value, the estimated battery current value Iest, the current reference value Iref, and the control signals phase shift θ*;
output the generated control signals to the DC-DC converter; and
output the charging output from the DC-DC converter to the electric vehicle based on the generated control signals.