A method for real-time detection of decommissioned power battery SOC

Abstract

The invention relates to the technical field of battery detection, and specifically discloses a method for detecting the SOC of decommissioned power batteries in real time. The invention is aimed at a group of decommissioned power batteries with the same state parameters after screening. After a small number of test experiments in the early stage, on the basis of introducing the four parameters of resistance R, voltage U, current I and temperature T, the model is first established to measure the parameters of each battery in this group, and then the measured parameters are established by U, The three-dimensional relationship model in which the I value determines the R value and the three-dimensional relationship model in which the SOC value is determined by the R and T values, wherein the R value is the intermediary of the two three-dimensional relationship models. After the mathematical model is established, when this series of batteries with the same state parameters are used in different occasions, it only needs to measure the three parameters U, I, and T, and the corresponding SOC can be found according to the two three-dimensional relationship models.

Description

technical field [0001] The invention relates to the technical field of battery detection, in particular to a method for real-time detection of the SOC of a decommissioned power battery. [0002] technical background [0003] A power battery is a power source that provides power for tools, and usually refers to a battery that provides energy for vehicles such as new energy vehicles and electric bicycles. The main types in daily life include lead-acid batteries with sealed valve ports, lithium iron phosphate batteries, and ternary lithium batteries. [0004] Power battery cascade utilization, usually when the remaining capacity of the power battery of new energy vehicles is reduced to 70%-80% of the initial capacity, it cannot meet the requirements of vehicle use. After testing, screening, and reorganization, the decommissioned power batteries are still capable of being used in low-speed electric vehicles, backup power sources, power storage and other fields with relatively st...

AI Technical Summary

Problems solved by technology

The other is a prediction method based on a neural network algorithm. The accuracy of its prediction depends on a large number of comprehensive target sample data. The input training data and training methods will affect the estimation accuracy of SOC.

The algorithms of the above two methods are complex, the amount of calculation is large, and the required calculation cycle is long

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