Vehicle Wake-Up Controller Detection for Battery Discharge Prevention
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Solution Overview
Problem
Controllers in vehicles intermittently wake up due to erroneous operations, leading to battery discharge and difficulty in identifying the wake-up inducing controller, which disrupts the sleep state of other controllers.
Innovation Solution
A system and method for detecting a wake-up inducing controller by generating error information based on transmission errors, storing this information, and using a managing controller and server to predict battery discharge by counting wake-up occurrences exceeding a threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If controllers are connected through CAN bus to enable remote wake-up function, then vehicle operation flexibility is improved, but battery discharge risk increases due to erroneous wake-up operations
Solution Approach 1:
The patent implements a feedback mechanism where the managing controller monitors wake-up events from multiple controllers, tracks wake-up counts, and provides feedback to identify erroneous wake-up operations. This feedback loop enables the system to detect abnormal wake-up patterns and prevent battery discharge by identifying controllers that incorrectly trigger wake-up events.
Solution Approach 2:
The managing controller serves as an intermediary between individual controllers and the battery power management system. It collects wake-up information from multiple controllers, processes this information to identify erroneous wake-up events, and coordinates the response to prevent battery discharge, thereby mediating between the need for remote wake-up functionality and battery conservation.
2Speed
If controllers wake up in unplanned situations to perform operations, then system responsiveness is improved, but identification of wake-up inducing controller becomes difficult
Solution Approach 1:
The managing controller implements a feedback mechanism that monitors and records wake-up events from multiple controllers. By tracking which controller initiates each wake-up event and comparing expected versus actual wake-up patterns, the system can identify erroneous wake-up inducing controllers while maintaining fast system responsiveness.
Solution Approach 2:
Each controller is equipped with the capability to self-report its wake-up status and operational state to the managing controller. This self-service approach allows controllers to autonomously provide diagnostic information, enabling the managing controller to identify erroneous wake-up events without requiring complex external monitoring infrastructure.
3Measurement precision
If error information is collected and analyzed to identify wake-up inducing controllers, then diagnostic accuracy is improved, but system complexity increases
Solution Approach 1:
The managing controller is designed with multi-functionality, serving both as a coordination center for wake-up operations and as a diagnostic system for identifying erroneous controllers. By consolidating these functions in a single controller rather than distributing complexity across multiple components, the system achieves high diagnostic accuracy without proportionally increasing overall system complexity.
Solution Approach 2:
The system monitors changes in key parameters such as wake-up count, wake-up timing, and controller operational state to identify erroneous wake-up events. By focusing on specific critical parameters rather than analyzing all possible system states, the patent achieves high diagnostic accuracy while keeping the error information processing system relatively simple and manageable.
Data Source
AI summary
An embodiment system for controlling a vehicle includes at least one controller configured to generate error information based on a number of times a transmission error is detected after transmitting a first message after waking up and store the error information at a time point at which the first message is successfully transmitted, a managing controller configured to receive the error information from the at least one controller, in response to the first message being successfully transmitted, and determine a first wake-up controller based on the received error information, and a server configured to receive information about the first wake-up controller from the managing controller, predict an operation of the vehicle based on the information about the first wake-up controller, and generate prediction information.