Charging and discharging control method and system for series batteries in battery module

Abstract

The invention discloses a charging and discharging control method and system for series batteries in a battery module, and relates to the technical field of battery thermal management, and the method comprises the steps: executing three-ring cooperative control based on an updated circuit parameter set in a charging and discharging process, and generating actual energy flow data containing phase change material heat exchange data; based on heat exchange data and real-time phase change progress parameters of the phase change material in the actual energy flow data, calculating a phase change progress value of the phase change material through a phase change kinetic model, performing dual verification in combination with voltage and temperature change trends, dynamically correcting a topology reconstruction instruction, and triggering three-stage fault diagnosis to obtain a fault-tolerant reconstruction instruction; when the charging and discharging cycle is finished, the reconstruction depth and the phase change utilization rate parameter of the phase change material are stored based on a fault-tolerant reconstruction instruction, the Seebeck coefficient is optimized through a self-learning algorithm, and a cross-cycle transfer parameter set is generated. The Seebeck coefficient is reversely corrected through the phase change utilization rate parameter, and thermoelectric attenuation caused by material aging is inhibited.

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