Dynamic Battery Charging Current Control for Lithium-Ion Safety

The charging current is made dynamic rather than fixed. The control unit continuously adjusts the charging current based on real-time temperature measurements from multiple locations within the battery. At low temperatures, the charging current is automatically reduced to prevent lithium plating, while at higher temperatures, the current can be increased to improve charging speed. This dynamic adaptation resolves the contradiction between charging speed and battery safety.

The charging parameters (current and voltage) are changed based on temperature conditions. The system monitors temperature at multiple locations and adjusts charging parameters accordingly - using lower currents at low temperatures to prevent damage, and higher currents at acceptable temperatures to improve charging speed. This parameter adaptation directly addresses the contradiction by making charging safety dependent on real-time thermal conditions.

The battery is segmented into multiple stacks, and each stack is monitored independently with its own temperature measurements and charging current determination. The control unit processes each stack's data separately and determines the overall charging current based on the most restrictive stack conditions. This segmentation approach improves safety by catching local overheating or cooling issues while managing complexity through modular processing of identical data structures for each stack.

The control unit performs multiple functions using a unified approach: it monitors temperature, determines state of charge, calculates maximum permissible charging current for each stack, and controls the charging process. By making the control unit multi-functional and using consistent algorithms across all stacks, the system achieves high reliability without proportionally increasing complexity, as the same hardware and software patterns are reused for each function and each stack.