A distributed lithium battery pack energy storage system

Abstract

The invention discloses a distributed lithium battery group energy storage system, which includes several energy storage control units for parallel connection to a DC bus; data sharing is performed between the energy storage control units through bus communication; the energy storage control unit includes a single A battery pack composed of a bulk lithium battery, a bidirectional DC converter, a microcontroller and a state monitoring module; each microcontroller is equipped with an independent charging control program, which is used to Status monitoring data and DC bus voltage U A Determine the charging mode of the corresponding energy storage control unit; each microcontroller is equipped with a coordinated discharge control program, and the coordinated discharge control program is used according to the shared data and the DC bus voltage U A Determine the overall discharge pattern. The invention solves the technical problem of low reliability and energy utilization rate of the lithium battery in the lithium battery group energy storage system in the prior art, can prolong the service life of the lithium battery, and reduce the cost.

Description

technical field [0001] The invention belongs to the field of lithium battery energy storage. Background technique [0002] With the increasing depletion of global fossil energy and the impact of factors such as the environment and climate, electric vehicles, as the main body of new energy vehicles, have achieved unprecedented development. Power battery is one of the core components of electric vehicles, and its performance and safety issues have become the key factors restricting the development of electric vehicles. Power batteries for electric vehicles represented by lithium-ion batteries have many advantages such as high energy density, light weight, low self-discharge rate, and long service life. They are currently the most practical energy storage method for electric vehicles. [0003] At present, the voltage and capacity of single lithium batteries are relatively small, and multiple single lithium batteries are usually connected in series and parallel to meet the appl...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the above technologies, the present invention provides a distributed lithium battery pack energy storage system, which solves the technical problems of low battery reliability and energy utilization in the lithium battery pack energy storage system in the prior art

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