A control method for a modular battery balancing system based on multi-agent technology

Abstract

The invention discloses a modular battery equalization system based on a multi-agent technology. The system comprises battery modules, battery management units, second-stage equalization converter output buses and a communication network among the battery modules; each battery management unit comprises a second-stage equalization converter which is used for non-dissipation and two-way equalizationcontrol between the corresponding battery module and the other battery modules; controllers provide state information in the corresponding battery modules for the communication network among the battery modules; the battery management units not only share the mainframe working stress of a traditional equalization system but also is more compatible with equalization systems of different system batteries through battery assembly modularization. The invention further discloses an equalization control method based on the multi-agent technology. Electric power transmission among all the battery management units is controlled through the cooperation of the second-stage equalization converter output buses, the SoC equalization speed of the battery modules is increased, global balance managementis achieved in a completely distributed manner, and the reliability and adaptability of a control strategy are further improved.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle power batteries, and more specifically relates to a control method of a modular battery balancing system based on multi-agent technology. Background technique [0002] Traditional fuel vehicles seriously affect energy security. The exhaust gas and noise generated by them can cause serious pollution to the urban environment and pose a serious threat to the ecological environment. In order to save resources, protect the environment, and meet the needs of social sustainable development strategies, new energy vehicles have become the focus of attention all over the world. Among them, pure electric vehicles have become the development focus of major automobile companies in the world, and there are still many problems to be solved urgently in the development of pure electric vehicles. [0003] From the perspective of power batteries, the inconsistency of battery packs is a difficult problem th...

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Problems solved by technology

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a control method of a modular battery balancing system based on multi-agent technology, aiming at solving the problem that both access and balancing control of batteries in the prior art depend on the centralized battery control unit , resulting in the calculation amount of the centralized control unit easily reaching the upper limit, which makes the battery module lack of scalability

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