EV Power Mode Control for Simpler Battery-Saving Operation
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Solution Overview
Problem
Conventional electric vehicles have complex power mode systems that can lead to battery overconsumption and user confusion.
Innovation Solution
A simplified power mode control method for electric vehicles that includes an off mode, a first power mode for convenience devices, and a second power mode for driving essential devices, with optional utility and EV READY modes, managed by a controller that switches modes based on start button, brake, and shift lever operations, as well as user settings and battery state of charge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional four-mode power system (OFF, ACC, IGN, READY) is implemented, then power mode functionality is comprehensive, but device complexity and user confusion increase
Solution Approach 1:
The conventional four-mode power system is segmented into two main modes: first power mode (combining ACC and IGN functions) and second power mode (READY mode). This segmentation reduces complexity while preserving essential functionality by grouping modes based on their operational characteristics and power consumption profiles.
Solution Approach 2:
The first power mode serves as a universal mode that encompasses both ACC (convenience devices) and IGN (all devices) functionalities. This multi-functional approach eliminates the need for separate ACC and IGN modes, thereby simplifying the overall power mode system while maintaining comprehensive device support.
2Ease of operation
If multiple power modes are maintained with extended idle timing, then user convenience is improved, but battery overconsumption occurs
Solution Approach 1:
The idle timing for automatic mode transition is made dynamic rather than fixed. The controller adjusts the idle timing based on vehicle state and operational context, allowing sufficient user convenience time while preventing excessive battery consumption by transitioning modes appropriately when conditions change.
Solution Approach 2:
The system incorporates feedback mechanisms where the controller continuously monitors vehicle state and battery conditions to determine when to transition from the first power mode to the second power mode or to off mode. This feedback-based control ensures that convenience is maintained while preventing battery overconsumption through timely mode transitions.
Data Source
AI summary
A method for controlling power of an electric vehicle is provided. The electric vehicle includes a start button, a high voltage battery, a driving essential device configured to receive power from the high voltage battery, a convenience device configured to receive power from the high voltage battery, and a controller configured to convert a power mode to one of a first power mode or a second power mode. The method includes converting, by the controller, the power mode to the first power mode in response that the start button is operated one time in the off mode; converting the power mode to the second power mode in response that the start button is operated and a brake is operated in the off mode or the first power mode; and converting the power mode to the off mode in response that a first set time elapses in the first power mode.