Battery Charging Control Using Fastest-Charge Thermal Management
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Solution Overview
Problem
Current battery charging technologies lack a method to increase charging speed while ensuring safety and efficiency, particularly for new energy electric vehicles, where high charging speeds are essential to reduce charging time during long-distance travel.
Innovation Solution
A charging control method that obtains and utilizes 'fastest-charge' data to perform thermal management control, ensuring the battery temperature remains within a target range by cooling or heating, thereby optimizing charging time and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high charging speed is implemented, then charging time is reduced, but thermal safety and battery temperature control become problematic
Solution Approach 1:
The system performs preliminary actions by pre-cooling the battery before high-speed charging begins and pre-heating before low-speed charging. This anticipatory thermal management ensures the battery is in the optimal temperature state before charging starts, allowing higher charging speeds to be sustained longer without exceeding temperature limits, thus resolving the contradiction between charging speed and temperature control
Solution Approach 2:
The system implements periodic thermal management by alternating between high-speed and low-speed charging phases based on real-time temperature monitoring. When temperature reaches a threshold, the system switches to low-speed charging or pauses to allow cooling, then resumes high-speed charging when temperature drops. This periodic modulation of charging speed based on temperature cycles enables sustained high productivity while maintaining thermal safety
2Productivity
If high charging speed is implemented, then charging time is reduced, but battery safety hazards increase
Solution Approach 1:
The system employs continuous feedback mechanisms by monitoring battery temperature, voltage, and current in real-time during charging. Based on this feedback, the charging control device dynamically adjusts charging parameters, switches between high and low-speed charging modes, or terminates charging when safety thresholds are approached. This closed-loop feedback control ensures high charging speeds are maintained only when safe, resolving the contradiction between productivity and reliability
Solution Approach 2:
The system applies beforehand cushioning by setting conservative temperature thresholds and safety margins before charging begins. The thermal management system prepares cooling systems in advance and maintains temperature buffers below critical limits, preventing thermal runaway and safety hazards even during high-speed charging. This proactive safety cushioning allows higher charging speeds while maintaining battery reliability
3Reliability
If thermal management control is implemented during charging, then battery safety is ensured, but system complexity increases
Solution Approach 1:
The system implements self-service thermal management where the battery management system automatically monitors its own temperature, voltage, and current states, and autonomously adjusts charging parameters without requiring complex external control systems. The charging control device uses simple rule-based logic that leverages the battery's own state information to make control decisions, reducing overall system complexity while maintaining safety
Solution Approach 2:
The system merges the thermal management function with the existing charging control system rather than adding a separate complex thermal management subsystem. The charging control device integrates temperature monitoring and control logic into its existing charging parameter management, combining multiple functions (charging control, temperature monitoring, cooling control) into a single integrated system that reduces overall complexity while ensuring battery safety
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively reduces charging time to near minimum levels while ensuring thermal safety, maintaining the battery's health and efficiency.
Implementation Method 1
performing thermal management control on the battery based on a current battery temperature and a maximum battery temperature corresponding to a current state-of-charge (SOC) increment section
Data Source
AI summary
This application provides a charging control method, a charging control device, an electronic device, and a storage medium. The charging control method includes: obtaining fastest-charge data, where a charging time in the fastest-charge data is less than or equal to a minimum charging time for a same state-of-charge (SOC) increment section in historical charging processes; and performing charging control on a battery based on the fastest-charge data. By obtaining the fastest-charge data and performing charging control on the battery based on the fastest-charge data, the charging control method according to this application can ensure that the charging time is close to or equal to the minimum charging time in historical charging processes, thereby effectively increasing the charging speed.