Battery SOC estimation method, battery management system and computer readable storage medium

Abstract

The invention discloses a battery SOC estimation method, a battery management system and a computer readable storage medium. The method comprises the steps that battery actual measurement data are obtained, and the battery actual measurement data comprise actual measurement current, actual measurement voltage, actual measurement SOC and actual measurement accumulated historical electric quantity; querying a correction data table according to the actually measured current and the actually measured voltage, and obtaining SOC upper limit correction data and SOC lower limit correction data matched with the actually measured current and the actually measured voltage; determining an SOC upper limit threshold value and an SOC lower limit threshold value according to the actually measured accumulated historical electric quantity, the SOC upper limit correction data and the SOC lower limit correction data; and correcting the actually measured SOC by adopting the SOC upper limit threshold value and the SOC lower limit threshold value to obtain a target SOC. The accuracy of the target SOC estimated by the battery SOC method is high, and the error between the target SOC and the actual SOC of the battery is small, so that the SOC estimation can meet the requirements of high accuracy, low resource requirement and high real-time performance.

Description

technical field [0001] The present invention relates to the technical field of battery management, in particular to a battery SOC estimation method, a battery management system and a computer-readable storage medium. Background technique [0002] SOC (short for State Of Charge, that is, the state of charge of the battery or the remaining power), refers to the ratio of the remaining dischargeable power of the battery to the power of the fully charged state after the battery has been used for a period of time or left unused for a long time. SOC is an important parameter of the entire battery energy storage system. Accurate estimation of SOC can realize the rational use of battery energy, prevent unreasonable use of the battery such as overcharge or overdischarge, and improve the service life of the battery. [0003] Existing SOC estimation methods include but are not limited to ampere-hour integration method, real-time voltage correction method, open circuit voltage method and...

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide a battery SOC estimation method, a battery management system, and a computer-readable storage medium to solve the problem that existing SOC estimation methods cannot take into account high accuracy, low operating resources, and strong real-time performance

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