REAL TIME LIFE-TIME MONITORING IN ELECTRIC VEHICLE POWERTRAINS
A method includes receiving, by a processing device of a vehicle, one or more measurements related to a component of the vehicle. The method also includes determining, by the processing device, based on the one or more measurements, a failure rate and a mean time to failure (MTTF) for the vehicle component. The method also includes transmitting, by the processing device using a communication interface, the failure rate and the MTTF to one or more destination systems. The method also includes implementing, by the processing device based on a determination of a failure rate increase for the vehicle component, one or more actions to increase an operation lifetime of the vehicle component.
1 . A method, comprising:
receiving, by a processing device of a vehicle, one or more measurements related to a vehicle component of the vehicle;
determining, by the processing device, based on the one or more measurements, a failure rate and a mean time to failure (MTTF) for the vehicle component;
transmitting, by the processing device using a communication interface, the failure rate and the MTTF to one or more destination systems; and
implementing, by the processing device based on a determination of a failure rate increase for the vehicle component, one or more actions to increase an operation lifetime of the vehicle component.
2 . The method of claim 1 , wherein the one or more measurements include one or more of:
a temperature of the vehicle component;
a voltage of the vehicle component; or
an electrical current of the vehicle component.
3 . The method of claim 1 , further comprising:
determining, by the processing device, a failure rate and an MTTF for each of a plurality of vehicle components; and
calculating, by the processing device, a total failure rate associated with the vehicle based on the failure rate and the MTTF determined for each of the vehicle components.
4 . The method of claim 1 , wherein the one or more destination systems includes an infotainment system of the vehicle or a client electronic device, and wherein information associated with the failure rate and the MTTF is displayed on a screen of the infotainment system or the client electronic device.
5 . The method of claim 1 , wherein the one or more destination systems includes a cloud system remote from the vehicle, the method further comprising:
receiving, by the processing device using the communication interface, a software update transmitted from the cloud system,
wherein the software update includes changes to one or more operating parameters of the vehicle related to the one or more actions to increase the operation lifetime of the vehicle component.
6 . The method of claim 1 , wherein the vehicle component includes:
a high-voltage battery and an associated battery management system (BMS);
a low-voltage battery;
a direct current (DC)-DC converter;
an onboard charger;
a traction inverter; or
one or more electric motors.
7 . The method of claim 6 , wherein the vehicle component is the onboard charger, and wherein implementing, by the processing device based on the determination of the failure rate increase for the vehicle component, the one or more actions includes:
reducing a maximum level 2 charging power of the onboard charger; or
disabling level 2 charging and only allowing level 3 DC fast charging.
8 . The method of claim 6 , wherein the vehicle component is the one or more electric motors and the one or more electric motors includes only one electric motor, and
wherein implementing, by the processing device based on the determination of the failure rate increase for the vehicle component, the one or more actions includes derating power to the one electric motor.
9 . The method of claim 6 , wherein the vehicle component is the one or more electric motors and the one or more electric motors includes a first electric motor and a second electric motor, and
wherein implementing, by the processing device based on the determination of the failure rate increase for the vehicle component, the one or more actions includes, based on an amount of the failure rate increase:
determining that the first electric motor is associated with the failure rate increase; and
reducing power provided to the first electric motor and increasing power to the second electric motor, or disabling the first electric motor.
10 . The method of claim 6 , wherein the vehicle component is the DC-DC converter, and wherein implementing, by the processing device based on the determination of the failure rate increase for the vehicle component, the one or more actions includes disabling at least one non-critical accessory load on the DC-DC converter.
11 . The method of claim 6 , wherein the vehicle component is the high-voltage battery, and wherein implementing, by the processing device based on the determination of the failure rate increase for the vehicle component, the one or more actions includes, based on an amount of the failure rate increase:
derating a discharge power of the high-voltage battery; or
enabling a limp mode function of the vehicle.
12 . An electric vehicle, comprising:
a memory;
a communication interface; and
a processing device communicatively connected to the memory, the communication interface, and a vehicle component of the electric vehicle, wherein the processing device is configured to:
receive one or more measurements related to the vehicle component;
determine, based on the one or more measurements, a failure rate and a mean time to failure (MTTF) for the vehicle component;
transmit, using the communication interface, the failure rate and the MTTF to one or more destination systems; and
implement, based on a determination of a failure rate increase for the vehicle component, one or more actions to increase an operation lifetime of the vehicle component.
13 . The electric vehicle of claim 12 , wherein the one or more measurements include one or more of:
a temperature of the vehicle component;
a voltage of the vehicle component; or
an electrical current of the vehicle component.
14 . The electric vehicle of claim 12 , wherein the processing device is configured to:
determine a failure rate and an MTTF for each of a plurality of vehicle components; and
calculate a total failure rate associated with the electric vehicle based on the failure rate and the MTTF determined for each of the vehicle components.
15 . The electric vehicle of claim 12 , wherein the one or more destination systems includes an infotainment system of the electric vehicle or a client electronic device, and wherein information associated with the failure rate and the MTTF is displayed on a screen of the infotainment system or the client electronic device.
16 . The electric vehicle of claim 12 , wherein the one or more destination systems includes a cloud system remote from the electric vehicle, wherein the processing device is configured to:
receive, using the communication interface, a software update transmitted from the cloud system,
wherein the software update includes changes to one or more operating parameters of the electric vehicle related to the one or more actions to increase the operation lifetime of the vehicle component.
17 . The electric vehicle of claim 12 , wherein the vehicle component includes:
a high-voltage battery and an associated battery management system (BMS);
a low-voltage battery;
a direct current (DC)-DC converter;
an onboard charger;
a traction inverter; or
one or more electric motors.
18 . The electric vehicle of claim 17 , wherein the vehicle component is the onboard charger, and wherein, to implement, based on the determination of the failure rate increase for the vehicle component, the one or more actions, the processing device is configured to:
reduce a maximum level 2 charging power of the onboard charger; or
disable level 2 charging and only allow level 3 DC fast charging.
19 . The electric vehicle of claim 17 , wherein the vehicle component is the one or more electric motors and the one or more electric motors includes only one electric motor, and
wherein, to implement, based on the determination of the failure rate increase for the vehicle component, the one or more actions, the processing device is configured to derate power to the one electric motor.
20 . The electric vehicle of claim 17 , wherein the vehicle component is the one or more electric motors and the one or more electric motors includes a first electric motor and a second electric motor, and
wherein, to implement, based on the determination of the failure rate increase for the vehicle component, the one or more actions, the processing device is configured to, based on an amount of the failure rate increase:
determine that the first electric motor is associated with the failure rate increase; and
reduce power provided to the first electric motor and increase power to the second electric motor, or disable the first electric motor.
21 . The electric vehicle of claim 17 , wherein the vehicle component is the DC-DC converter, and wherein, to implement, based on the determination of the failure rate increase for the vehicle component, the one or more actions, the processing device is configured to disable at least one non-critical accessory load on the DC-DC converter.
22 . The electric vehicle of claim 17 , wherein the vehicle component is the high-voltage battery, and wherein, to implement, based on the determination of the failure rate increase for the vehicle component, the one or more actions, the processing device is configured to, based on an amount of the failure rate increase:
derate a discharge power of the high-voltage battery; or
enable a limp mode function of the electric vehicle.