EV Navigation Database Update via Vehicle Probing
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Solution Overview
Problem
The limited availability of charging stations for electric vehicles and the inaccuracy of existing vehicle navigation systems in identifying and routing to these stations pose challenges, particularly when the vehicle's state of charge is low, leading to potential exhaustion of the battery before reaching a charging station.
Innovation Solution
A vehicle communication environment that includes a telematics-navigation device and mobile device connected via a wireless communication network, which uses a charge station module to identify nearby charging stations, determine their characteristics, and provide the driver with the most efficient route to a compatible charging station, while also updating a remote server database with charging station information for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a vehicle navigation system uses a fixed database of charging station locations, then the system structure is simple, but the accuracy of charging station location identification deteriorates when stations are added or removed
Solution Approach 1:
The patent implements a feedback mechanism where the vehicle determines its own location while connected to a charging station, compares this determined location with the location stored in the navigation database, and uses this comparison to update the database. This feedback loop ensures the database remains accurate without requiring complex real-time tracking infrastructure.
Solution Approach 2:
The vehicle itself performs the location determination and database update function. When connected to a charging station, the vehicle autonomously determines its location, compares it with stored information, and updates the navigation database. This self-service approach eliminates the need for external verification systems while maintaining high accuracy.
2Measurement precision
If the vehicle determines charging station characteristics manually, then the information accuracy is high, but the time and energy required increases
Solution Approach 1:
The navigation database is pre-populated with charging station locations and characteristics from previous vehicle connections and updates. When the vehicle needs to find a charging station, it can quickly query this pre-prepared database rather than gathering information in real-time, significantly reducing the time required while maintaining accuracy through the update mechanism.
Data Source
AI summary
A system for updating a charge station database including information about charge station location and/or characteristic by determining and verifying charge station location and characteristics after a vehicle connects to a charging station. The vehicle determines (probes) the charge station location based upon the location of the vehicle while connected to the charging station. This location information is transmitted by the vehicle to a central database.