Vehicle Extended Park Mode Key-Off Load Reduction
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Solution Overview
Problem
Vehicle key-off load causes a significant reduction in battery state of charge when a vehicle is parked for an extended period, and existing solutions are inconvenient or difficult to implement, especially when the battery is hard to access.
Innovation Solution
A system of networked vehicle control modules that can be instructed to transition into an extended park mode, reducing key-off loads by slowing down or stopping periodic polling, disabling certain features, and limiting power consumption, either through a user interface or remotely via a cloud service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control modules continue periodic polling and maintain full functionality during extended parking, then system readiness and responsiveness are maintained, but battery state of charge significantly reduces
Solution Approach 1:
The control modules dynamically adjust their operational state based on the extended park mode status. Polling intervals are extended or suspended, and non-critical functions are disabled temporarily, allowing the system to transition between high-readiness and low-power states as needed
Solution Approach 2:
The system changes operational parameters such as polling frequency, function activation levels, and power consumption thresholds when entering extended park mode. These parameter adjustments reduce energy consumption while maintaining essential system functionality
2Loss of energy
If driver electrically disconnects the battery to limit key-off load, then battery state of charge is maintained, but ease of operation deteriorates due to difficult battery access and inconvenience
Solution Approach 1:
The control modules automatically reduce their own power consumption and key-off load without requiring driver intervention. The system self-manages energy conservation by disabling non-critical functions and extending polling intervals, eliminating the need for manual battery disconnection
Solution Approach 2:
The control modules act as intermediaries between the battery and various vehicle functions, intelligently managing power distribution and reducing load without requiring direct driver interaction with the battery itself
3Loss of energy
If control modules reduce key-off load by slowing polling and disabling features, then battery state of charge is maintained, but measurement precision and detection capability deteriorate
Solution Approach 1:
The system applies partial action by reducing polling frequency and disabling only non-critical functions during extended park mode. Essential monitoring and measurement capabilities are maintained at reduced levels, providing sufficient precision for safety-critical functions while conserving battery energy
Data Source
AI summary
A vehicle may include a control module and a plurality of vehicle control modules in networked communication with the control module. The control module may be configured to receive an indication from a user interface to transition the vehicle into an extended park mode, and responsive to the indication, instruct the plurality of vehicle control modules to perform operations to reduce their respective key-off loads on the vehicle. A cloud service may be configured to receive, over a wide-area network responsive to user input to a mobile device, an indication to transition a vehicle associated with the mobile device into an extended park mode, and responsive to the indication, provide a message over the network to the vehicle to instruct the vehicle to perform operations to reduce key-off loads of a plurality of vehicle control modules of the vehicle.