一种动力锂电池系统的SOH估算方法

The SOH Estimation Method for a Power Lithium Battery System

电池管理系统是保证锂电池系统稳定、高效、安全运行的重要技术手段。在电池管理系统中,电池状态估计,特别是荷电状态(state of charge,SOC)估计、健康状态(state of health,SOH)估计和功率状态(state of power,SOP)估计至关重要。SOC、SOH与SOP不仅与全生命周期内电池安全运行直接相关,也是其他功能有效实现的必要前提。文章研究的是SOH估算,此功能影响SOC的估算精度,进一步影响SOP的估算精度。文章基于实际的电池管理系统计算与控制能力,提出一种电池系统的SOH估算算法。

The battery management system is an important technical means to ensure the stable,efficient and safe operation of lithium battery system.In the battery management system,battery state estimation,especially the state of charge(SOC)estimation,state of health(SOH),and state of power(SOP)estimation,is very important.SOC,SOH and SOP are not only directly related to the safe operation of the battery in the whole life cycle,but also a necessary prerequisite for the effective realization of other functions.This paper studies the estimation of SOH,which affects the estimation accuracy of SOC and further affects the estimation accuracy of SOP.Based on the calculation and control ability of the actual battery management system,an algorithm for estimating the SOH of the battery system is proposed in this paper.