It consists of positive electrode, negative electrode, diaphragm and electrolyte. At present, nickel-manganese-cobalt ternary material or lithium iron phosphate is commonly used as the positive electrode of mainstream products, while the negative electrode is mostly made of graphite and other carbon materials.

With the advantages of high energy density, no memory effect, fast charging and discharging, fast response speed, flexible configuration, short construction cycle, etc., it is widely used in wind power, photovoltaic and other new energy generation side, grid side, user side energy storage projects.

The working principle of lithium battery energy storage system is to use the migration of lithium ions between positive and negative electrodes to achieve the process of charge and discharge, in order to achieve the storage and release of electrical energy.

Specifically, the lithium battery energy storage system consists of multiple lithium-ion battery cells, each of which includes a positive electrode, a negative electrode, and an electrolyte. There is a diaphragm separating the positive and negative electrodes, but the electrolyte can pass through the diaphragm to form an ion channel.
When the lithium battery storage system needs to store electrical energy, an external power source delivers electrical energy to the lithium battery storage system through a charger, and the electrical energy is converted into chemical energy and stored between the positive and negative electrodes of the lithium-ion battery monobloc through the ion channel. In this process ions migrate from the positive to the negative electrode, forming a chemical reaction.

When electrical energy is required, the lithium battery storage system converts the stored electrical energy into DC output, which is processed through equipment such as inverters and supplied to external loads. At this time, lithium ions will migrate from the negative electrode to the positive electrode, and at the same time release chemical energy to produce electrical energy output.
The performance of Li-ion battery storage systems is affected by a variety of factors, such as the number of battery cells, electrochemical performance, the structure of the battery pack and the control management system. Different application scenarios require the design and selection of a suitable lithium battery energy storage system based on actual requirements.