An online evaluation method and device for an energy storage battery pack

Abstract

The present invention relates to an online evaluation method and device for an energy storage battery pack. The method includes: obtaining a relationship table of working voltage and SOC calibration value; respectively determining SOC accuracy and SOH accuracy according to the relationship table; according to the SOC accuracy and The SOH accuracy determines the evaluation coefficient of the energy storage battery group, and uses the evaluation coefficient of the energy storage battery group to evaluate the energy storage battery group. The technical solution provided by the present invention obtains the accuracy of SOC and SOH by extracting the SOC calibration value of the relationship table between the working voltage and the SOC calibration value, thereby determining the evaluation coefficient of the energy storage battery pack, and timely grasping the performance of the energy storage battery pack according to the evaluation coefficient Operating characteristics, prompting the user to perform operation and maintenance of the energy storage battery pack, prolonging the service life of the energy storage battery pack, thereby effectively improving the application effect of the energy storage battery pack.

Description

technical field [0001] The invention relates to the field of power system energy storage, in particular to an online evaluation method and device for an energy storage battery pack. Background technique [0002] Under the background of the construction of energy Internet and the rapid development of new energy, battery energy storage power stations have ushered in a good opportunity for development. At the same time, with the rapid progress of energy storage technology and the sharp drop in cost, my country's energy storage industry has transitioned from demonstration application to the initial stage of commercialization. A number of energy planning policies issued by the state recently, including the "Thirteenth Five-Year Plan", "Energy Development Strategic Action Plan (2014-2020)", "Energy Technology Revolution Innovation Action Plan (2016-2030)", "Power" The 13th Five-Year Plan and the 13th Five-Year Plan for Renewable Energy all regard energy storage as one of the key ...

AI Technical Summary

Problems solved by technology

[0003] Many battery energy storage power stations have been built and put into operation in China. They are mainly used on the renewable energy side, the urban distribution network side, and the user side of industrial and commercial parks. There are still many problems that need to be studied in depth. The reason is that there is a big difference between the key technologies of the integrated application of battery energy storage power stations in my country and foreign advanced technologies, and the performance of the battery itself is particularly prominent.

[0004] In addition, the energy storage battery pack has a large amount of operating data, and the energy storage monitoring system cannot evaluate the operating status of the energy storage battery pack online, resulting in the failure of timely operation and maintenance of the energy storage battery pack, which affects the service life of the energy storage battery pack and limits the The application value of energy battery pack

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