EV Charging Power Control Using Connector Temperature Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electric vehicle charging technologies face challenges in maintaining charging speed and efficiency while ensuring safety, as high-power charging can lead to increased battery temperatures, causing safety accidents and prolonging charging time.
Innovation Solution
An electric vehicle charging control apparatus and method that dynamically adjusts charging power based on the working temperatures of the power connector and charging control box, reducing power output when temperatures exceed certain thresholds to prevent overheating and ensuring safe charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-power charging mode (large current and high voltage) is adopted to meet user needs for fast charging, then charging speed is improved, but battery temperature increases leading to safety risks
Solution Approach 1:
The charging control apparatus dynamically adjusts charging power based on real-time temperature monitoring. The system transitions from static high-power charging to dynamic power adjustment, increasing or decreasing charging power according to battery temperature conditions, thereby maintaining fast charging capability while preventing overheating risks
Solution Approach 2:
The system implements closed-loop feedback control by continuously monitoring battery temperature and adjusting charging power accordingly. When battery temperature exceeds thresholds, the system reduces charging power; when temperature is within safe ranges, it maintains or increases power, creating a self-regulating charging process that balances speed and safety
2Reliability
If charging power is reduced after battery temperature increases to ensure safety, then charging safety is improved, but charging time is prolonged
Solution Approach 1:
The system changes charging power parameters dynamically based on temperature thresholds. Instead of uniformly reducing power, it adjusts power levels according to specific temperature ranges, allowing higher power when safe and lower power only when necessary, thus minimizing charging time extension while ensuring safety
Solution Approach 2:
The system applies partial power reduction only when temperature exceeds safe thresholds, rather than continuously reducing power. This selective approach maintains high charging power for as much of the charging process as possible, reducing charging time extension to only the periods when safety requires power limitation
3Reliability
If charging power is continuously reduced to maintain safety, then charging safety is improved, but charging efficiency decreases
Solution Approach 1:
The closed-loop feedback mechanism ensures charging power is reduced only when and where safety risks exist. By continuously monitoring temperature and adjusting power in real-time, the system maintains high charging efficiency during safe operating conditions while providing safety protection only when temperature thresholds are exceeded, thus avoiding unnecessary efficiency loss
Data Source
AI summary
An electric vehicle charging control apparatus and method related to a technical field of electric vehicle charging. The method includes: obtaining a first working temperature of an interior of a power connector and a second working temperature of an interior of a charging control box during charging the electric vehicle with a charging power equal to the first charging power; and controlling the charging power output to the electric vehicle according to the working temperature of the interior of the power connector obtained by the power connector temperature detection unit. By the embodiments of the present disclosure, the charging efficiency can be improved and the charging time can be shortened on the premise of ensuring the charging safety of the electric vehicle.