EV Charging Time Windows Based on Charge-Point Battery Temperature
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Solution Overview
Problem
Existing approaches to electric vehicle charging inefficiencies due to rough estimation of battery temperatures based on local weather conditions, neglecting varying environmental conditions at each charge point, leading to increased electricity grid load and costs for customers.
Innovation Solution
A method and system that determine a charging time window for electric vehicles by predicting battery temperatures based on specific environmental conditions at each charge point, using a battery temperature function and optimizing charging efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If battery temperature is estimated based on local weather conditions for all charge points, then the charging strategy can be implemented across multiple locations, but the estimation precision deteriorates due to neglecting different environmental conditions at each charge point
Solution Approach 1:
The patent applies local quality by capturing charge-point-specific environmental conditions (sun exposure, wind exposure, insulation, urban heat island effect) and using them to determine location-specific battery temperature functions. This allows the system to adapt the general charging strategy to local conditions at each charge point, improving temperature estimation accuracy while maintaining broad applicability across multiple locations
Solution Approach 2:
The patent segments the charging strategy into two levels: a general weather-aware framework that applies across all charge points, and location-specific environmental condition parameters that are determined for each charge point. This segmentation allows the system to maintain versatility across multiple locations while improving precision through local adaptations
2Productivity
If battery heating or cooling is performed to reach optimal operating temperature, then charging efficiency is improved, but electricity consumption increases
Solution Approach 1:
The patent applies preliminary action by determining the charging time window in advance based on predicted battery temperature and environmental conditions. The system calculates when the battery will naturally reach optimal temperature ranges, allowing charging to be scheduled at the most efficient time without unnecessary heating or cooling, thus improving charging efficiency while minimizing electricity consumption
Solution Approach 2:
The patent uses feedback by continuously monitoring actual battery temperature and comparing it with predicted temperatures based on environmental conditions. This feedback loop allows the system to refine temperature functions for different charge points and adjust charging time windows to optimize both charging efficiency and electricity consumption
3Reliability
If charging is interrupted to cool down battery in hot weather, then battery safety is improved, but charging time increases
Solution Approach 1:
The patent applies preliminary action by predicting battery temperature evolution based on environmental conditions and charging power levels before charging begins. The system determines optimal charging time windows in advance where battery temperature will remain within safe ranges, eliminating the need for interruptions while maintaining battery safety and minimizing charging time
Data Source
AI summary
An approach is provided for providing a charging time window for an electric vehicle based on environmental conditions at a charge point. The approach involves receiving a request to charge a battery of an electric vehicle at a charge point. The approach also involves determining a battery temperature operating range for the battery. The approach further involves determining a battery temperature function that predicts a temperature of the battery based on an environmental condition at the charge point. The approach further involves determining a charging time window for charging the battery based on the battery operating range and the battery temperature function. The approach further involves outputting the charging time window. The approach can involve determining a temperature regulating time period for the battery and/or the charge point to cool down or heat up before charging based on the battery temperature and/or the environmental condition at the charge point.