Maintenance methods suitable for lithium-ion battery energy storage systems

Abstract

The invention relates to a maintenance method for a lithium-ion battery energy storage system, which includes steps such as battery discreteness evaluation, system state evaluation, system dynamic maintenance, static maintenance, and capacity calibration. The cells are listed as unqualified battery cells, and the difference between the voltage value and the average voltage value at the end of charging or discharging exceeds different limits respectively as battery cells to be processed or unqualified battery cells, and the battery cells that need static maintenance Static maintenance, replace all unqualified battery units, perform capacity calibration according to the standard working conditions of the energy storage system or downgrade unqualified battery units. The invention can realize the detection and maintenance of the energy storage system, helps to maintain the good operation state of the energy storage system, and is suitable for the energy storage system in which the lithium ion battery is used as the energy storage element and other similar energy storage systems.

Description

technical field [0001] The invention relates to a maintenance method suitable for a lithium-ion battery energy storage system. Background technique [0002] Renewable new energy such as wind energy and solar energy is an important direction of energy development, which plays a positive role in solving energy shortages and protecting the environment. However, the use of solar and wind energy for power generation does not necessarily catch up with the peak period of power consumption. To solve the time difference between power generation and power consumption, energy storage is required. This is an important technical bottleneck restricting the development of new energy. The key to the potential of energy lies in energy storage technology. [0003] In recent years, my country has successively established many different types of lithium-ion battery chemical energy storage systems in various places. The main task of the energy storage system is to meet the functional requiremen...

AI Technical Summary

Problems solved by technology

[0004] In order to make better use of the energy storage system that has been in operation for many years, reduce waste of resources, and improve system safety and efficiency, it is necessary to effectively maintain the existing energy storage system to maintain a good operating state of the energy storage system and eliminate safety issues in a timely manner. Hidden dangers, but at present, it is common to wait for the system to fail to run before checking the place where the problem occurs, and there is a lack of effective maintenance methods