EV Battery Charging Thermal Control Using Internal Resistance Heat
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Solution Overview
Problem
Existing thermal management methods for electric vehicle batteries consume significant time, limiting fast charging capabilities due to repeated heating or cooling processes based on fixed temperature thresholds.
Innovation Solution
A dynamic thermal management system that adjusts heating and cooling functions based on the cell's temperature, state of charge, and ambient conditions, disabling heating when the target temperature is reached to utilize internal resistance for faster charging, and enabling cooling before reaching current-limiting temperatures to maintain optimal charging speed and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If thermal management is performed on the power battery group during charging, then the charge/discharge speed is improved and safety is ensured, but charging time increases due to repeated heating and cooling processes
Solution Approach 1:
The system performs preliminary thermal management actions by predicting future battery temperature based on historical data and charging parameters. This allows the system to proactively adjust heating or cooling before temperature deviations occur, avoiding repeated thermal management cycles during charging and reducing overall charging time while maintaining safety
Solution Approach 2:
The system implements a feedback mechanism that continuously monitors battery temperature, charging current, and historical thermal management effects. This feedback loop enables dynamic adjustment of thermal management strategies, optimizing the balance between charging speed and temperature control, thereby reducing unnecessary heating and cooling cycles
2Productivity
If heating is performed to increase charge/discharge speed at low ambient temperature, then charging performance is improved, but energy consumption increases
Solution Approach 1:
The system applies partial heating action by determining the minimum necessary heating duration and intensity based on predicted temperature trends and charging requirements. Instead of continuous or excessive heating, the system applies just enough thermal management to achieve the target temperature, thereby improving charging speed while minimizing energy consumption
Solution Approach 2:
The system dynamically adjusts heating parameters (power, duration, timing) based on ambient temperature, battery initial temperature, and charging current predictions. By optimizing these parameters, the system achieves the necessary temperature increase for fast charging while minimizing the energy consumed by the heating process
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 approach reduces charging time and energy consumption by optimizing thermal management, ensuring faster charging without triggering current limitations and maintaining battery safety.
Implementation Method 1
the charging current is consumed on the internal resistance of the cell, so that heat is generated to maintain the temperature of the cell
Data Source
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AI summary
A mobile apparatus, a charging control method, and a chip are provided, and relate to the field of electric vehicle (10) charging. The charging control method is applied to the mobile apparatus. The mobile apparatus is configured to connect to a charging pile (20) to form a charging system. The charging pile is configured to charge a cell (101) of the mobile apparatus. The method includes: detecting a temperature of the cell; and if the temperature of the cell is equal to a target temperature, disabling a heating function for the cell until charging ends, where a temperature change of the cell is positively correlated with internal resistance of the cell and a charging current provided by the charging pile. This solution can implement fast charging of the cell.