A method and device for estimating the state of charge of a lithium ion battery. The method comprises the following steps: open circuit voltage and state of charge A, fitting for lithium ion batteries; B, using observer method to estimate the state of charge C for lithium ion battery; lithium ion battery state of charge is estimated in step B, if greater than a predetermined threshold, the concept of sensor method to estimate the state of charge lithium ion battery is used, if less than a predetermined threshold, using current time integral method estimate the state of charge of power lithium ion batteries. The lithium ion battery of the invention load estimation method and apparatus of state power, to avoid the current time integral method and observer method, provides the high estimation accuracy in the whole life cycle, the whole state of charge region.
【技术实现步骤摘要】
【国外来华专利技术】PCT国内申请,说明书已公开。
【技术保护点】
PCT国内申请,权利要求书已公开。
【技术特征摘要】
【国外来华专利技术】PCT国内申请,...
【专利技术属性】
技术研发人员:姜久春,张彩萍,赵婷,张维戈,王占国,龚敏明,吴健,孙丙香,时玮,李雪,牛利勇,李景新,黄彧,黄勤河,鲍谚,
申请(专利权)人:北京交通大学,
类型:发明
国别省市:北京,11
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