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Method, device and storage medium for estimating state of health of lithium battery

A state of health and lithium battery technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of complex health state, poor data collection, and difficulty in adapting to quality, so as to improve adaptability and reduce the complexity of health state Effect

Active Publication Date: 2021-08-06
SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV +2
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Problems solved by technology

[0006] Embodiments of the present invention provide a method, device, and storage medium for estimating the state of health of a lithium battery, so as to at least solve the technical problems in the related art that detection of the state of health of a lithium battery is relatively complicated and difficult to adapt to poor quality collected data

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  • Method, device and storage medium for estimating state of health of lithium battery
  • Method, device and storage medium for estimating state of health of lithium battery
  • Method, device and storage medium for estimating state of health of lithium battery

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Embodiment Construction

[0034] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0035]It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate c...

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Abstract

The invention discloses a method, a device and a storage medium for estimating the state of health of a lithium battery. Wherein, the method includes: using a plurality of health factors HI corresponding to a plurality of effective charging cycles as an input variable, and a plurality of health states SOH corresponding to a plurality of effective charging cycles as an output variable, performing training to obtain a Gaussian process regression GPR model, Among them, the GPR model is obtained by using multiple sets of data through machine learning training. Each set of data in the multiple sets of data includes: the HI of the effective charging cycle and the SOH corresponding to the HI; obtain the HI of the charging cycle to be detected, and input the HI GPR model, the SOH corresponding to HI is output by the GPR model. The invention solves the technical problems in the related art that the detection of the health state of the lithium battery is relatively complicated and difficult to adapt to poor quality collected data.

Description

technical field [0001] The present invention relates to the field of batteries, in particular to a method, device and storage medium for estimating the state of health of a lithium battery. Background technique [0002] At present, lithium batteries are widely used in the fields of electric vehicles (EVs), hybrid electric vehicles (HEVs) and grid energy storage, and the estimation of their state of health (SOH) is a key technology in the use of lithium batteries. . [0003] There are two main categories of SOH estimation methods: model-based and data-driven. Model-based methods mainly include aging empirical models, equivalent circuit models, and electrochemical models. However, the empirical model of aging needs a lot of manpower, time and resources, and in the context of the rapid development of lithium battery manufacturing technology, the empirical model established for the old type of battery may lose its timeliness; the equivalent circuit model is characterized by mo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/392
CPCG01R31/392
Inventor 陈振徐华池赵霁肖伟贾俊潘鸣宇孙舟袁小溪王伟贤
Owner SICHUAN ENERGY INTERNET RES INST TSINGHUA UNIV
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