Container multi-cluster parallel energy storage system with multi-stage protection

Abstract

The invention discloses a container multi-cluster parallel energy storage system with multi-stage protection. The container multi-cluster parallel energy storage system comprises multiple single-cluster energy storage systems and a three-stage controller; each single-cluster energy storage system comprises multiple battery boxes, a safety power supply module and a two-stage single-cluster controller; the battery boxes are connected in series in sequence, and adopt a CAN1 bus internal network for communication simultaneously; the positive and negative input ends of the safety power supply module are connected with the series-wound battery boxes; the positive and negative output ends of the safety power supply module of each cluster are connected to the high-voltage positive electrode and negative electrode outputs of the container energy storage system in parallel; the two-stage single-cluster controller performs measurement and control on the corresponding safety power supply module, and meanwhile, is connected to the CAN1 bus internal network through a CAN1 interface to realize communication with the battery boxes and is connected to a CAN2 bus internal network through a CAN2 internal network interface to realize communication with the three-stage controller; and the three-stage controller is in communication with an external management system through a CAN1 bus external network, and is connected with an inverter through a 485 bus external network.

Description

technical field [0001] The invention relates to an energy storage system, in particular to a container multi-cluster parallel energy storage system with multi-level protection. Background technique [0002] In recent years, with the advancement of the green energy strategy and the implementation of a new round of power system reform supporting policies, the application fields and types of energy storage technology have gradually become clear, large-scale energy storage technology has been recognized by the market, and its application value has become increasingly clear. The focus and difficulty of energy storage systems in the industrial and commercial fields are large-capacity applications and large-scale construction, which require energy storage systems to have high safety, high specific energy, and high cycle life. Currently, containers are mostly used as system carriers to easily adapt to changing applications. surroundings. [0003] Multiple lithium battery modules ar...

AI Technical Summary

Problems solved by technology

Lithium-ion battery clusters are suitable for parallel use. Considering that the state of charge of each cluster is not completely consistent, a circulating current will be generated when connected in parallel. Multi-cluster battery pack parallel protection device for container energy storage system

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