Network topology of high-capacity battery energy storage system and control method

• Main Authors: GU YUJUN, LI LEYING, ZOU ZUBING, YAO WEIWEI, WU HAIFEI, LIU RUIKUO
• Format: Patent
• Language: Chinese; English
• Published: 31.05.2022
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention provides a network topology of a high-capacity battery energy storage system and a control method, the network topology comprises a plurality of battery pack string branches, each battery pack string branch is of a multi-stage structure formed by a plurality of battery packs connected in series, and each battery pack is formed by a plurality of single batteries connected in series and serves as a basic unit of the network topology. Wherein for each battery pack string branch, except the battery pack at the tail end, the negative electrodes of the other battery packs are not only connected with the positive electrode of the next-stage battery pack through the connection switch module, but also connected with the negative electrodes of the battery packs of all the other battery pack string branches at the next stage; and positive and negative terminals of each battery pack string branch are correspondingly connected with positive and negative terminals of external charging and discharging equipmen