Battery management system and method

Abstract

A battery management system and method for a battery pack that includes multiple battery cells are disclosed. The battery management system includes a detector coupled to the battery cells, multiple temperature sensors coupled to the battery cells, a current sensor coupled to the battery cells in series, and a processor coupled to the current sensor. The detector generates first monitoring signals corresponding to cell voltages across the battery cells. The temperature sensors generate second monitoring signals corresponding to temperatures of the battery cells. The current sensor generates third monitoring signals corresponding to currents of the battery cells. The processor determines whether an undesired condition is present according to the first, second, and third monitoring signals, wherein the processor calculates a plurality of factors according to the cell voltages and the combination of the temperature and the current upon detecting an abnormal condition if the summation of the multiple factors is larger than a threshold value. The battery management system and method is able to detect whether an undesired condition is present, and take protection measures, thus preventing the undesired condition from developing into a false state.

Description

technical field [0001] The present invention relates to a battery system, in particular to a battery management system and method. Background technique [0002] Battery packs or battery modules including a plurality of battery cells are used in various applications such as notebook computers, electric vehicles, hybrid vehicles, and energy storage systems. During operation, a battery cell may experience an error state, such as overvoltage, overcurrent, overtemperature, or a micro-short circuit inside the cell, thereby damaging the battery cell or causing safety problems, such as explosion or fire. [0003] The battery management system is used to detect the cell voltage, current and temperature of the battery cells, and if an error state occurs, the battery management system takes protective measures. However, when filtering noise, there is a predetermined delay between when an error condition occurs and when it is detected by the battery management system. Thus, protective...

AI Technical Summary

Problems solved by technology

However, when filtering noise, there is a predetermined delay between when an error condition occurs and when it is detected by the battery management system

As a result, protective measures cannot be taken in time when an error state occurs, thereby damaging the battery pack or causing safety problems such as explosion or fire

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