EV Route Guidance Using Minimum Battery Reserve
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Solution Overview
Problem
Conventional navigation systems for electric vehicles do not provide adequate guidance on routes suitable for electric vehicles, leading to uncertainties regarding battery charging and range anxiety during long-distance travel due to insufficient charging infrastructure and user habits of not fully discharging the battery.
Innovation Solution
A navigation apparatus that includes a driving route generating unit, battery information acquiring unit, and mileage calculating unit to determine a power-saving driving distance based on the current and minimum remaining battery levels, providing customized route options and charging station information to alleviate range anxiety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional navigation systems display maximum driving distance based on SOC or DTE, then the battery usage information is provided, but users experience range anxiety and uncertainty about charging requirements during long-distance travel
Solution Approach 1:
The system performs preliminary calculations of power-saving driving distance before the user completes route planning. By pre-computing the distance that can be traveled while maintaining a minimum battery level and comparing it with the route distance, the system determines in advance whether charging is required, thereby eliminating user uncertainty about battery sufficiency before departure
Solution Approach 2:
The system provides continuous feedback to the user by displaying both the power-saving driving distance and the route distance, along with clear indicators (checkmarks or exclamation marks) showing whether charging is required. This feedback mechanism gives users confidence in their battery situation and charging requirements throughout the navigation process
2Reliability
If users set a minimum remaining battery level at destination, then battery sufficiency can be ensured, but the driving route planning becomes more complex
Solution Approach 1:
The system extracts the minimum battery level requirement from the overall route planning process. By separating this parameter setting from complex route optimization, the system allows users to simply input their desired minimum battery level without dealing with complex calculations, while the system handles the complexity of determining whether charging is required
Solution Approach 2:
The system pre-calculates the power-saving driving distance based on the user's minimum battery level setting before route determination. This preliminary calculation simplifies the subsequent route planning by providing a clear threshold (power-saving driving distance) that the system compares against the route distance to determine charging requirements
3Measurement precision
If the system calculates power-saving driving distance considering minimum battery level, then accurate battery sufficiency information is provided, but the calculation complexity increases
Solution Approach 1:
The system extracts the minimum battery level parameter from the complex SOC-based distance calculation. By separating this single parameter setting from the detailed power consumption calculations, the system allows users to set their minimum battery level without understanding or managing the complex energy consumption models, while still receiving precise battery sufficiency information
Solution Approach 2:
The system automatically performs the complex power-saving driving distance calculations based on the user's simple minimum battery level input. The navigation apparatus self-services by gathering vehicle power consumption data, calculating the distance that maintains the minimum battery level, and comparing it with the route distance, freeing users from complex manual calculations
Data Source
AI summary
A navigation apparatus generates route guidance for an electric vehicle based on information on a battery power state of the electric vehicle. The navigation apparatus includes a driving route generating unit, a battery information acquiring unit, a mileage calculating unit and a driving information setting unit. The driving route generating unit receives destination information and generates a driving route corresponding to the destination information. The battery information acquiring unit obtains information about a minimum remaining amount of a battery of the electric vehicle input by a driver of the electric vehicle. The mileage calculating unit calculates an available driving distance of the electric vehicle based on a current remaining amount of the battery and the minimum remaining amount of the battery. The driving information setting unit sets information related to the driving route based on the available driving distance, and displays the information via a display apparatus.