Peer-to-peer DC fast charging
Power systems capable of charging chargeable systems at a power greater than or equal to a predetermined value are disclosed. Example embodiments may be a power system for an electric vehicle. The chargeable system may be an electric vehicle. Some embodiments are capable of peer-to-peer fast charging of electric vehicles at a power greater than or equal to 50 kW.
1 . A power system comprising:
a multi-phase motor having an electrically neutral Connection;
a direct current (“DC”) charge plug;
a traction battery electrically connected to a bus negative, the bus negative being connected to the DC charge plug;
a traction inverter electrically connected to the multi-phase motor via phase connectors, and electrically connected to the traction battery;
a contactor electrically connected to the motor neutral connection and electrically connected to the DC charge plug; and
a controller electrically connected to the multi-phase motor and the traction inverter, the controller configured to control power by using motor inductance and inverter switching controls to either increase or decrease voltage to the DC charge plug.
2 . The power system of claim 1 , wherein the power system is a power system for an electric vehicle (“EV”).
3 . The power system of claim 1 , wherein the multi-phase motor is a three-phase motor.
4 . The power system of claim 1 , wherein the DC charge plug is a Combined Charging System (“CCS”) connector or a Charge de Move (“CHAdeMO”) plug.
5 . The power system of claim 1 , wherein the DC charge plug is connected to a chargeable system.
6 . The power system of claim 5 , wherein the power system is capable of charging the chargeable system at a power greater than or equal to 50 kW.
7 . The power system of claim 5 , wherein the chargeable system is an EV.
8 . The power system of claim 1 , wherein the DC charge plug is connected to a system capable of charging the power system.
9 . The power system of claim 8 , wherein the system capable of charging the power system is an EV.
10 . A controller of a power system according to claim 1 , comprising:
one or more processors; and
non-transitory memory storing instructions that when executed by the one or more processors perform a method comprising:
receiving an indication to put the power system in a charging mode; and
in response to receiving the indication, sending a signal to the contactor of the power system to create a connection between the electrically neutral connection and the contactor's connection to the DC charging plug, placing the power system into the charging mode.
11 . The controller of claim 10 , wherein the charging mode is a supply mode.
12 . The controller of claim 10 , wherein the charging mode is a load mode.
13 . The controller of claim 10 , wherein the method further comprises:
controlling power by increasing voltage at the DC charge plug.
14 . The controller of claim 10 , wherein the method further comprises:
controlling power by decreasing voltage at the DC charge plug.
15 . An electric vehicle comprising:
a multi-phase motor having an electrically neutral connection;
a direct current (“DC”) charge plug;
a traction inverter electrically connected to the multi-phase motor via phase connectors, and electrically connected to a traction battery; and
a controller electrically connected to the multi-phase motor and the traction inverter, the controller configured to control power by using motor inductance and inverter switching controls to either increase or decrease voltage at the DC charge plug, wherein the electric vehicle is configured to charge a chargeable system connected to the DC charge plug at a power up to a predetermined amount.
16 . The electric vehicle of claim 15 , wherein the multi-phase motor is a three-phase motor.
17 . The electric vehicle of claim 15 , wherein the electric vehicle is a hybrid electric vehicle.
18 . The electric vehicle of claim 15 , wherein the predetermined amount is equal to or greater than 50 kW.
19 . The electric vehicle of claim 15 , further comprising:
a traction battery electrically connected to a bus negative, the bus negative being connected to the DC charge plug; and
a contactor electrically connected to the motor neutral connection and electrically connected to the DC charge plug.