EV Onboard Display Device for Range Information Segmentation
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Solution Overview
Problem
Existing onboard display systems for electric vehicles frequently change the displayed remaining driving range as accessory power consumption changes, making it difficult for occupants to understand how different load states affect the vehicle's range, and they cannot easily comprehend how minimizing or maximizing accessory power consumption impacts the range without actual operation.
Innovation Solution
An onboard display device that shows both the minimum and maximum remaining driving ranges, along with a momentary range, using visually recognizable shapes on a display unit, allowing occupants to easily understand the impact of accessory power consumption on the vehicle's range without frequent changes in the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the remaining driving range is updated frequently based on accessory power consumption changes, then the information accuracy is improved, but the display stability deteriorates causing annoyance to occupants
Solution Approach 1:
The patent segments the remaining driving range information into multiple distinct values: maximum remaining driving range (when accessories are off), minimum remaining driving range (when accessories are on), and current remaining driving range (actual state). This segmentation allows the display to show comprehensive information without requiring frequent updates of a single value, thereby maintaining display stability while providing accurate information.
2Loss of information
If the remaining driving range is updated in real-time with accessory changes, then the information freshness is improved, but the ease of understanding deteriorates as occupants cannot easily comprehend the impact of different load states
Solution Approach 1:
The patent applies local quality by providing different levels of information detail for different user needs. The display shows maximum and minimum remaining driving ranges as boundary references that remain relatively stable, while the current remaining driving range updates with accessory changes. This allows occupants to easily understand the range of possible values and the impact of accessory usage without being overwhelmed by constant fluctuations.
Solution Approach 2:
The patent performs preliminary action by calculating and displaying the maximum and minimum remaining driving ranges in advance, before the actual accessory usage occurs. These boundary values serve as reference points that help occupants understand the potential impact of accessory consumption on the remaining driving range, making it easier to comprehend power consumption effects without needing to actually operate accessories to test the impact.
3Loss of information
If multiple remaining driving range values are displayed simultaneously, then the information completeness is improved, but the device complexity increases
Solution Approach 1:
The patent applies dynamics by making the display adaptive rather than static. The display shows multiple remaining driving range values (maximum, minimum, and current) but uses visual differentiation and selective updating to manage complexity. The maximum and minimum values are displayed as stable reference boundaries, while the current value dynamically updates based on actual accessory usage, providing complete information in a manageable visual format.
Data Source
AI summary
A minimum remaining driving range estimated to be the distance which the vehicle can travel on the remaining battery power, in a case where a power load which accessories capable of receiving electric power from a battery place on the battery is the greatest within a variable range in accordance with input of operations, and a maximum remaining driving range estimated to be the distance which the vehicle can travel on the remaining battery power, in a case where the power load is the smallest within the variable range, are displayed on a display unit.