Redundant energy storage system and dynamic redundancy control method

Abstract

The invention discloses a redundant energy storage system and a dynamic redundancy control method, the redundant energy storage system comprises m0 working batteries and m2 redundant batteries, the types of the working batteries and the redundant batteries are the same, the working batteries and the redundant batteries are connected in series, and the relation between m0 and m2 is shown in the following formula: in the formula, beta is the shape parameter of a single battery. The control method realizes dynamic redundancy scheduling based on the battery health degree and the cycle time so as to prolong the battery life of the system. According to the redundant energy storage system, by setting the specific and optimal number of redundant batteries, the service life of the batteries can be prolonged to the maximum extent, so that the operation cost is reduced, and the system economy is good; the dynamic redundancy control method realizes a series battery system scheduling control strategy based on the battery health degree and the cycle time, can be applied to different types of batteries, battery stations and other devices with characteristics similar to those of the batteries, and has great application prospects.

Description

technical field [0001] The invention relates to the technical field of energy storage systems, and relates to a redundant energy storage system and a dynamic redundant control method. Background technique [0002] With the development of society, people's life and work are closely related to energy supply. At present, electric energy is an indispensable energy form for people's life and work. Due to its particularity, electric energy is difficult to store. It often requires the cooperation of battery packs to store electric energy. to accommodate fluctuations in power demand. [0003] In order to increase the port voltage of the system, the existing energy storage system often adopts the form of multiple groups of energy storage units connected in series. Once an energy storage unit fails in a series-connected battery pack, it is often necessary to remove the series-connected system, resulting in a large capacity loss of the energy storage system. The use of redundant bat...

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Problems solved by technology

[0005] Due to the above-mentioned defects in the prior art, the present invention provides a redundant energy storage system with reasonable design, long battery life and low cost, which overcomes the defects that the existing redundant energy storage system is difficult to balance the battery life and the operating cost is too high

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