Distributed energy storage device and system, control method and storage medium

Abstract

The invention discloses a distributed energy storage device and system, a control method and a storage medium. The distributed energy storage device comprises at least one energy storage device used for being connected to a common direct current bus, and a coordination controller which is in communication connection with the at least one energy storage device and is used for controlling the at least one energy storage device, wherein each energy storage device comprises a field controller and an energy storage unit, the field controller is in communication connection with the energy storage unit, and each field controller is in communication connection with the coordination controller. According to the invention, the coordination controller and the local controller are additionally arranged between the energy storage device and the control system, and the power and energy information of the energy storage units is processed and then sent to the control system, so that the large-scale distributed energy storage device is achieved, the power and energy information of the large-scale energy storage units can be efficiently processed at the same time, and the problems of communication delay, congestion and loss caused by echelon utilization energy storage of a large number of retired batteries in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of electric power control, in particular to a large-scale distributed energy storage device, system, control method and storage medium suitable for cascade utilization. Background technique [0002] In recent years, China has become one of the world's largest electric vehicle markets. However, the battery life is only 4-8 years, after which it must be replaced. Since the decommissioned power batteries still have 70% to 80% available capacity, the cascade utilization of decommissioned power batteries has become one of the research directions in this field. [0003] However, there are still some difficulties in the development of energy storage for decommissioned power batteries: as more and more power batteries enter the decommissioning market, the amount of decommissioned power batteries in China will reach hundreds of thousands of tons in a few years. Small-scale energy storage applications can no longer ...

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Problems solved by technology

[0003] However, there are still some difficulties in the development of energy storage for decommissioned power batteries: as more and more power batteries enter the decommissioning market, the amount of decommissioned power batteries in China will reach hundreds of thousands of tons in a few years. Small-scale energy storage applications can no longer accommodate a huge number of decommissioned batteries, so large-scale cascade utilization energy storage systems must be developed

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