The invention relates to the technical field of batteries, in particular to a detection method and device for lithium precipitation of a lithium battery, a medium, a system and a vehicle. The method for detecting lithium precipitation of the lithium battery comprises the steps that typical charge-discharge cycles of the lithium battery are determined, the coulombic efficiency of each typical charge-discharge cycle is calculated, the typical charge-discharge cycles comprise at least two times, and the typical charge-discharge cycles are non-full charge-discharge cycles; and detecting that the coulombic efficiency of the typical charge-discharge cycle has abnormal data, and determining that lithium separation occurs in the lithium battery. According to the technical scheme, on the premise that the operation condition of the lithium ion battery is not changed, the coulombic efficiency of the battery is monitored, the abnormal data of the coulombic efficiency is used as a judgment basis for determining lithium precipitation of the lithium battery, the problem that an existing coulombic efficiency testing method is limited in practical application is solved, and the testing efficiency of the lithium ion battery is improved. The universal application in actual life is facilitated.
本公开涉及电池技术领域,尤其涉及一种锂电池发生析锂的检测方法、装置、介质、系统及车辆。其中,锂电池发生析锂的检测方法包括:确定锂电池的典型充放电循环,并计算各次典型充放电循环的库伦效率,典型充放电循环包括至少两次,典型充放电循环为非满充满放循环;检测到典型充放电循环的库伦效率出现异常数据,确定锂电池发生析锂。本公开的技术方案,在不改变锂离子电池运行工况的前提下,通过对电池库伦效率进行监测,以库伦效率出现异常数据作为确定锂电池发生析锂的判断依据,有利于解决现有的库伦效率测试方法在实际应用中受到限制的问题,有利于在实际生活中得到普遍应用。
Method, device, medium and system for detecting lithium precipitation of lithium battery and vehicle
锂电池发生析锂的检测方法、装置、介质、系统及车辆
2024-11-12
Patent
Electronic Resource
Chinese
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