A self-correcting SOC estimation method for mining lithium batteries

Abstract

The invention discloses a self-correction SOC estimation method for lithium batteries used in mines, which performs self-correction on the lithium battery SOC prediction according to the daily charge and discharge conditions of the lithium battery, and the self-correction of the system is based on the different charging and discharging states of the battery pack itself , by correcting the battery pack model, and at the same time due to the randomness of particle generation, the realizability of the SOC estimation result is enhanced; due to the versatility of the battery model, the recursive least squares identification method for the battery model makes the accuracy of the model continuously Improve and will not cause model inaccuracy due to excessive discharge current changes. The SOC estimated by particle filter increases the accuracy of SOC estimation in the case of non-Gaussian noise; it can solve the inaccurate estimation phenomenon of SOC prediction differences due to different individual characteristics of different batteries, reduce the change with the charge and discharge state, and finally be effective Enhance the stability and safety of mining lithium batteries.

Description

technical field [0001] The invention relates to a lithium battery SOC estimation method, in particular to a self-correcting SOC estimation method for mine lithium batteries. Background technique [0002] The battery is the power supply part of the equipment. The normal communication of various electronic equipment, testing equipment, and communication systems must be maintained by electricity. Whether it is possible to provide electricity in time for the equipment in daily life and maintain its safe and stable operation and Power selection and management are closely related. In recent years, with the continuous development of lithium battery technology, compared with other storage batteries, lithium batteries have the advantages of small size, light weight, high energy density, etc., and are favored by various manufacturers and coal mine users. With the continuous deepening of research on lithium-ion batteries, through continuous research on positive and negative electrode ...

AI Technical Summary

Problems solved by technology

One charge and discharge is counted as one cycle or one cycle. With the increase of charge and discharge times, the chemical reactions inside the lithium-ion battery will lead to the consumption of battery polarity, electrolyte and diaphragm, etc., resulting in changes such as increased internal resistance of the battery. As a result, the battery capacity is irreversibly attenuated and degraded, which affects the actual capacity of the battery.

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