The invention belongs to the technical field of power batteries, and particularly relates to a power battery health state diagnosis method and device, and the method comprises the steps: firstly obtaining a theoretical discharge strategy according to a preset power battery discharge model; then obtaining operation parameters of a power battery of the health state experiment vehicle and a represented discharge strategy through a battery management system, carrying out optimization iteration to obtain an optimal discharge strategy, and comparing the optimal discharge strategy with a theoretical discharge strategy until an error between the optimal discharge strategy and the theoretical discharge strategy is within a preset error threshold value; and finally, testing data in the optimal discharge strategy in the user vehicle, comparing the data with the discharge characteristic of the power battery of the optimal discharge strategy, and if the comparison result does not exceed a preset range, indicating that the power battery is in a healthy state. Otherwise, diagnosing the health state of the power battery. The problem that an effective discharging strategy is lacked in the prior art can be solved.
本发明属于动力电池技术领域,尤其涉及一种动力电池健康状态诊断的方法及装置,包括:首先根据预设动力电池放电模型获取理论放电策略;然后通过电池管理系统获取健康状态实验车的动力电池的运行参数及表征的放电策略,并进行优化迭代获取最佳放电策略,与理论放电策略进行比对,直至最佳放电策略与理论放电策略的误差在预设的误差阈值内;最后将最佳放电策略中的数据在用户车进行试验,与最佳放电策略的动力电池放电特性进行比对,若比对结果未超出预设的范围,则表明动力电池处于健康状态;反之则进行动力电池健康状态诊断。本发明能够解决现有技术中存在的缺少有效的放电策略的问题。
Method and device for diagnosing health state of power battery
一种动力电池健康状态诊断的方法及装置
2023-11-07
Patent
Electronic Resource
Chinese
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