EV Route Navigation Using Temperature-Aware Battery Capacity
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Solution Overview
Problem
Current vehicle navigation systems for electric vehicles do not adequately address the concern of battery performance deterioration due to low-temperature environments, which can lead to issues like metal lithium deposition and dendrite short circuits, and fail to provide accurate guidance based on battery remaining capacity and temperature data.
Innovation Solution
A vehicle navigation apparatus that includes a processor to acquire vehicle position data, search for candidate routes, and calculate battery remaining capacity based on temperature data and traveling conditions, ensuring the battery has sufficient capacity upon arrival at the destination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vehicle navigation apparatus provides route guidance based on standard navigation criteria (distance, time), then the guidance efficiency is improved, but the battery performance deterioration in low-temperature environments is not prevented
Solution Approach 1:
The patent changes the route selection parameters by incorporating temperature data and battery remaining capacity calculations. The route search unit now considers not only distance and time but also the temperature conditions along candidate routes and the impact on battery capacity, selecting routes that maintain battery capacity above a predetermined threshold upon arrival at the destination.
Solution Approach 2:
The patent performs preliminary calculations of battery remaining capacity for each candidate route before final route selection. The route search unit acquires temperature data in advance, calculates the expected battery capacity upon arrival for each route option, and uses this information to filter and select appropriate routes, preventing battery performance deterioration before it occurs.
2Reliability
If the vehicle navigation apparatus calculates battery remaining capacity for each candidate route, then the battery safety is improved, but the calculation complexity increases
Solution Approach 1:
The patent integrates the battery remaining capacity calculation function within the existing route search unit, allowing this component to perform both traditional route searching and battery-aware route evaluation. The route search unit utilizes acquired temperature data and vehicle speed information to calculate battery capacity for multiple candidate routes simultaneously, achieving multi-functionality without adding separate dedicated calculation systems.
Solution Approach 2:
The route search unit performs self-service by autonomously acquiring temperature data, calculating battery remaining capacity for each candidate route, and selecting appropriate routes based on predetermined battery capacity thresholds. The system uses its own internal resources and acquired external data to make route decisions without requiring external intervention or complex additional subsystems.
3Measurement precision
If the vehicle navigation apparatus acquires temperature data for route planning, then the battery remaining capacity accuracy is improved, but the data acquisition requirements increase
Solution Approach 1:
The patent acquires temperature data specifically for the regions along candidate routes rather than comprehensive environmental data. The route search unit obtains temperature information localized to the areas where the vehicle would travel, focusing data collection on relevant spatial zones. This approach improves battery capacity calculation accuracy for the specific routes while minimizing unnecessary data acquisition.
Data Source
AI summary
A vehicle navigation apparatus includes a vehicle position data acquirer, a traveling candidate route searcher, an external data acquirer, and a battery remaining capacity calculator. The battery remaining capacity calculator calculates, for searched traveling candidate routes, a battery remaining capacity being upon arrival of the vehicle at a destination of corresponding one of the searched traveling candidate routes, based on a traveling condition and acquired external data. The external data acquirer acquires temperature data as the external data that is upon passing through corresponding one of the searched traveling candidate routes. The battery remaining capacity calculator calculates the battery remaining capacity being upon the arrival at the destination for each searched traveling candidate route based on the temperature data. The traveling candidate route searcher searches for one or more of the traveling candidate routes in which the battery remaining capacity is equal to or more than a predetermined amount.