US-20260127915-A1 - SLEEP STATE CONSUMPTION ESTIMATION FOR VEHICLES

Abstract

Sleep state power consumption estimation for vehicles is provided. An electric vehicle can include an electronic control unit (ECU). The ECU can enter a sleep state responsive to the electric vehicle entering a sleep mode and enter a run state from the sleep state responsive to the electric vehicle exiting the sleep mode. The ECU can determine, based on a range loss estimation corresponding to an estimated power consumption during the sleep mode, a remaining rage estimation of the vehicle. In some implementations, the electric vehicle includes sensors, and the ECU can obtain sensor data indicating a power consumption measurement during the sleep mode of the electric vehicle, from which the remaining range estimation can be determined. In other implementations, the ECU can determine the remaining range estimation without active hardware monitoring based on a predetermined sleep state power consumption rate and a duration of the sleep mode.

Inventors

• Sanjeewa Keven Sugatapala
• Kyle Lobo
• Baojin WANG
• Long Phi Huynh
• Ajay Kumar

Assignees

• RIVIAN IP HOLDINGS, LLC

Dates

Publication Date

20260507

Application Date

20250409

Claims (20)

1. 1 . An electronic control unit for a vehicle, the electronic control unit comprising: one or more processing cores; and wherein the one or more processing cores are configured to: enter a sleep state responsive to the vehicle entering a sleep mode, enter a run state from the sleep state responsive to the vehicle exiting the sleep mode; and determine, based on a range loss estimation corresponding to an estimated power consumption during the sleep mode, a remaining range estimation of the vehicle.
2. 2 . The electronic control unit of claim 1 , wherein the one or more processing cores are configured to: obtain, from one or more sensors of the vehicle, sensor data indicating a power consumption measurement during the sleep mode of the vehicle; and determine, based on the sensor data, the range loss estimation that corresponds to the power consumption measurement.
3. 3 . The electronic control unit of claim 2 , wherein the one or more processing cores are configured to, responsive to determining the range loss estimation, provide the remaining range estimation of the vehicle to a device of a user.
4. 4 . The electronic control unit of claim 2 , wherein the one or more sensors comprises a power sensor.
5. 5 . The electronic control unit of claim 1 , wherein the one or more processing cores are configured to provide for display the remaining range estimation upon detection of an active drive state of the vehicle.
6. 6 . The electronic control unit of claim 1 , wherein the one or more processing cores are further configured to: obtain a first coulomb count measurement at a first location between a high voltage battery pack and a vehicle power load using a first sensor of a plurality of sensors; and obtain a second coulomb count measurement at a second location between a low voltage battery pack and the vehicle power load using a second sensor of the plurality of sensors, wherein the range loss estimation is determined using the first coulomb count measurement and the second coulomb count measurement.
7. 7 . The electronic control unit of claim 6 , wherein the one or more processing cores configured to obtain the first coulomb count measurement are further configured to obtain sensor data from the first sensor located at an output of a secondary power converter connected to an output of the high voltage battery pack.
8. 8 . The electronic control unit of claim 6 , wherein the one or more processing cores configured to obtain the first coulomb count measurement are further configured to obtain sensor data from the first sensor located at an input to a secondary power converter connected to an output of the high voltage battery pack.
9. 9 . The electronic control unit of claim 1 , wherein the remaining range estimation is determined based on a predetermined sleep state power consumption rate and a duration of the sleep mode, wherein the one or more processing cores are configured to: determine, responsive to the vehicle entering an active drive state following the vehicle exiting the sleep mode, a state of charge of a battery of the vehicle; modify the remaining range estimation into an updated remaining range estimation based on the state of charge of the battery; and provide for display the updated remaining range estimation.
10. 10 . The electronic control unit of claim 9 , wherein the one or more processing cores are configured to determine an updated range loss estimation based on the updated remaining range estimation.
11. 11 . The electronic control unit of claim 10 , wherein the one or more processing cores are configured to update the predetermined sleep state power consumption rate using the updated range loss estimation.
12. 12 . The electronic control unit of claim 11 , wherein the predetermined sleep state power consumption rate is iteratively updated after each update to the range loss estimation.
13. 13 . A method, comprising: setting, responsive to a vehicle entering a sleep mode, one or more processing cores of an electronic control unit of the vehicle to a sleep state; performing coulomb counting using one or more sensors to monitor a state of charge loss during the sleep mode of the vehicle; waking, responsive to a vehicle exiting the sleep mode, the one or more processing cores to a run state from the sleep state; and determining, by the one or more processing cores and based on the coulomb counting, a range loss estimation that corresponds to the state of charge loss during the sleep mode of the vehicle.
14. 14 . The method of claim 13 , further comprising: obtaining, from the one or more sensors, sensor data indicating a power consumption measurement during the sleep mode of the vehicle, wherein the range loss estimation corresponds to the power consumption measurement.
15. 15 . The method of claim 13 , further comprising: determining, by the one or more processing cores and based on the range loss estimation, a remaining range estimation; and providing for display the remaining range estimation upon detection of an active drive state of the vehicle.
16. 16 . The method of claim 13 , wherein performing the coulomb counting comprises: obtaining a first coulomb count measurement at a first location between a high voltage battery pack and a vehicle power load using a first sensor of a plurality of sensors; and obtaining a second coulomb count measurement at a second location between a low voltage battery pack and the vehicle power load using a second sensor of the plurality of sensors, wherein the range loss estimation is determined using the first coulomb count measurement and the second coulomb count measurement.
17. 17 . The method of claim 16 , wherein obtaining the first coulomb count measurement comprises obtaining sensor data from the first sensor located at an output of a secondary power converter connected to an output of the high voltage battery pack.
18. 18 . The method of claim 16 , wherein obtaining the first coulomb count measurement comprises obtaining sensor data from the first sensor located at an input to a secondary power converter connected to an output of the high voltage battery pack.
19. 19 . An electric vehicle, comprising: an electronic control unit comprising: one or more processing cores; and wherein the one or more processing cores are configured to: enter a sleep state responsive to the electric vehicle entering a sleep mode; enter a run state from the sleep state responsive to the electric vehicle exiting the sleep mode; determine, based on a predetermined sleep state power consumption rate and a duration of the sleep mode, a remaining range estimation; determine, responsive to the electric vehicle entering an active drive state following the electric vehicle exiting the sleep mode, a state of charge of a battery of the electric vehicle; modify the remaining range estimation into an updated remaining range estimation based on the state of charge of the battery; and provide for display the updated remaining range estimation.
20. 20 . The electric vehicle of claim 19 , wherein the one or more processing cores are further configured to: modify a range loss estimation into an updated range loss estimation based on the updated remaining range estimation; and update the predetermined sleep state power consumption rate using the updated range loss estimation, wherein the predetermined sleep state power consumption rate is iteratively updated after each update to the range loss estimation.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application claims the benefit of U.S. Provisional Application Ser. No. 63/717,751, entitled “SLEEP STATE CONSUMPTION ESTIMATION FOR VEHICLES,” and filed on Nov. 7, 2024, the disclosure of which is expressly incorporated by reference herein in its entirety. INTRODUCTION Vehicles are often provided with sensors for sensing aspects of the vehicle's operation and/or condition during operation of the vehicle. These sensors are typically disabled or off when the vehicle is not in operation. BRIEF DESCRIPTION OF THE DRAWINGS Certain features of the subject technology are set forth in the appended claims. However, for purpose of explanation, several embodiments of the subject technology are set forth in the following figures. FIGS. 1A and 1B illustrate schematic perspective side views of example implementations of a vehicle in accordance with one or more implementations. FIG. 2 depicts a view of example of a power system architecture that may be included in the vehicle of FIGS. 1A and 1B in accordance with one or more implementations. FIG. 3 is a flow chart of illustrative operations that may be performed for sensor-based sleep state consumption estimation for vehicles in accordance with one or more implementations. FIG. 4 is a flow chart of illustrative operations that may be performed for self-learning sleep state consumption estimation for vehicles in accordance with one or more implementations. FIG. 5 illustrates an electronic system with which one or more implementations of the subject technology may be implemented. DETAILED DESCRIPTION The detailed description set forth below is intended as a description of various configurations of the subject technology and is not intended to represent the only configurations in which the subject technology can be practiced. The appended drawings are incorporated herein and constitute a part of the detailed description. The detailed description includes specific details for the purpose of providing a thorough understanding of the subject technology. However, the subject technology is not limited to the specific details set forth herein and can be practiced using one or more other implementations. Structures and components are shown in block diagram form in order to avoid obscuring the concepts of the subject technology. Vehicles are often left parked in parking lots, parking garages, and along streets, sometimes for hours or days at a time. Parked vehicles are typically left in an off or sleep state in which most, if not all, of the mechanical or electrical systems of the vehicle are also off or in a standby state. This can reduce the power consumed while the vehicle is in the sleep or off state, which can be particularly beneficial for electric vehicles that are propelled by electrical power. However, it can also be advantageous to be able to monitor various systems and/or characteristics of the vehicle, even when the vehicle is in an off or sleep state. As one illustrative example, it can be beneficial to monitor a battery of a vehicle to detect power consumption continuously while in sleep mode that could, if not monitored, cause inaccurate remaining range estimations upon wake-up, which may contribute to user inconvenience and range anxiety. The subject technology addresses challenges involving the lack of an active system to monitor power consumption and estimate range loss during vehicle sleep mode. Embodiments of the subject technology provide for integrating a hardware sensor (e.g., a power sensor integrated circuit) into the vehicle's architecture to monitor power consumption continuously while in sleep mode. This sensor can measure the power consumption during the vehicle sleep mode, enhancing the accuracy of range estimates when the vehicle is in a wake state. Aspects of the subject technology can provide monitoring (e.g., for power consumption) in a vehicle (e.g., in a vehicle battery or battery pack), while the vehicle is in a sleep mode. The monitoring may be performed by switching one or more processing cores of an electrical control unit (ECU) of the vehicle to a run or wake state to obtain and analyze sensor data. Embodiments of the subject technology also provide for setting a predetermined sleep state power consumption rate (e.g., 10 watts per hour) from a high-voltage (HV) battery pack upon vehicle sleep initiation without active hardware monitoring. During this sleep state period, all processing cores (including all electronic control units (ECUs)) may become inactive, resulting in a lack of hardware not tracking range loss. One or more processing cores of an ECU in a run state (or wake state) may calculate a range loss based on the predetermined sleep state power consumption rate for the entire sleep duration. Upon transitioning into the wake state, the estimated range loss can be applied, providing a worst-case (or conservative) remaining range estimation to a user of the vehicle. Once the vehicle resume