Lithium ion battery health condition on-line estimation method applied to space

A lithium-ion battery, health status technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problem of not fully considering the dynamic change characteristics of the battery, not being able to realize online estimation applications, and data-driven methods relying on offline test data sets Completeness and other issues to achieve good adaptability, high reliability and accuracy, and good robustness

Inactive Publication Date: 2018-08-24
HARBIN INST OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that most of the existing battery health state estimation methods that use capacity or internal resistance as health factors cannot realize online estimation applications, and data-driven methods rely too much on

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  • Lithium ion battery health condition on-line estimation method applied to space
  • Lithium ion battery health condition on-line estimation method applied to space
  • Lithium ion battery health condition on-line estimation method applied to space

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Embodiment Construction

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0057] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0058] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0059] A method for online estimation of the state of health of a lithium-ion battery for space applications, th...

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Abstract

The invention provides a lithium ion battery health condition on-line estimation method applied to space, relates to the technical field of lithium ion battery health condition estimation, and solvesthe problems that in an existing battery health condition estimation method, most of methods for taking a capacity or an internal resistance as health factors cannot realize on-line estimation application, a data driving method overly depends on off-line test data set completeness, and dynamic change characteristics in the actual working process of a battery cannot be sufficiently considered. Theon-line test data of the battery is acquired, and an on-line health factor sequence is established according to the on-line test data of the battery, a mapping relation is established between SOH andan on-line health factor, based on a double-index degradation model, a state-space equation is established by the combination with the mapping relation between the established battery SOH and the on-line heath factor, and based on the state-space equation, estimation of SOH is estimated by the combination with a UPF algorithm, an SOH estimation result and the confidence region corresponding to theestimation result are obtained, and the battery health condition on-line estimation is completed. The lithium ion battery health condition on-line estimation method is suitable for on-line estimationof battery health conditions.

Description

technical field [0001] The invention relates to the technical field of estimating the state of health of lithium-ion batteries, in particular to an online estimation method for the state of health of lithium-ion batteries with distribution of confidence intervals. Background technique [0002] Lithium-ion batteries are widely used in consumer electronics, electric vehicles, communication energy storage base stations and other fields due to their high monomer output voltage, long cycle life, low self-discharge rate, high energy density, and no environmental pollution, and have gradually expanded to Aviation, aerospace, navigation and other military fields. Especially in space satellite applications, lithium-ion batteries can greatly reduce the weight and volume of loads. Compared with traditional nickel-hydrogen batteries and nickel-chromium batteries, lithium-ion batteries have great advantages and have become the third-generation satellite energy storage batteries. As the ...

Claims

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Application Information

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IPC IPC(8): G01R31/36
CPCG01R31/3648G01R31/392
Inventor 彭宇刘大同印学浩刘旺彭喜元
Owner HARBIN INST OF TECH
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