EV Charging Power Control for Battery Temperature Thresholds
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Solution Overview
Problem
Existing electric vehicle charging methods face challenges in maintaining high-speed charging while ensuring safety, as high-power charging can lead to increased battery temperatures, resulting in prolonged charging times and safety risks.
Innovation Solution
An electric vehicle charging control method and apparatus that periodically monitor the working temperature and adjust the charging power output, maintaining a first power level until the temperature exceeds specific thresholds, triggering prompts and reducing power to prevent overheating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-power charging mode (large current and high voltage) is adopted to meet users' needs for charging the vehicle battery, 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 battery temperature monitoring. When temperature exceeds predefined thresholds, the system automatically reduces charging power from high-power mode to low-power mode, creating a dynamic response to thermal conditions that balances charging speed with safety
Solution Approach 2:
The system implements closed-loop feedback control by continuously monitoring battery temperature and using this information to adjust charging power output. The temperature threshold comparison and subsequent power adjustment create a feedback mechanism that prevents overheating while maintaining efficient charging when conditions permit
2Object-affected harmful factors
If charging power is reduced after working temperature increases to ensure safety, then battery safety is improved, but charging time is prolonged
Solution Approach 1:
The system applies partial power reduction only when necessary (when temperature exceeds thresholds) rather than continuously reducing power. This allows the charging system to operate at full power during safe temperature ranges, minimizing charging time while still ensuring safety when temperature concerns arise
Solution Approach 2:
The charging control implements periodic temperature monitoring and power adjustment cycles. The system alternates between high-power and low-power charging modes based on temperature conditions, creating a rhythmic pattern of charging intensity that maintains safety while maximizing overall charging efficiency
Data Source
AI summary
An electric vehicle charging control method and apparatus related to the technical field of electric vehicle charging. The method includes: periodically obtaining a working temperature; maintaining a charging power output to an electric vehicle at a first charging power and triggering a first prompt signal, when the working temperature is greater than or equal to a first temperature threshold and less than a second temperature threshold; reducing the charging power output to the electric vehicle from the first charging power to a second charging power when the working temperature is greater than or equal to the second temperature threshold and less than a third temperature threshold; and stopping charging the electric vehicle when the working temperature is greater than or equal to the third temperature threshold. Therefore, 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.