Multi-input transformation-based dual-layer active balance circuit and implementation method

Abstract

The invention discloses a multi-input transformation-based dual-layer active balance circuit and an implementation method. The multi-input transformation-based dual-layer active balance circuit comprises a microcontroller, bottom-layer balance units, a top-layer balance unit and switching relays; the microcomputer sends a path of PWM signals to control the bottom-layer balance units to work alternately under a charge state and a discharge state, so that energy balance between adjacent battery units can be realized; the microcontroller sends two paths of identical PWM signals to control the top-layer balance unit to work alternately under a charge state and a discharge state, so that energy balance between adjacent battery modules can be achieved; and the microcontroller sends two paths of switching signals to control the switching of the relays, so that the moving direction of energy balanced between adjacent modules can be controlled. With the multi-input transformation-based dual-layer active balance circuit and the implementation method of the invention adopted, the inconsistency of the battery units and the inconsistency of the battery modules can be effectively improved, and the problems of low balance efficiency, low balance speed and difficulty in modular expansion of a traditional balance circuit can be solved.

Description

technical field [0001] The invention relates to a double-layer active equalization circuit based on multi-input conversion and a realization method. Background technique [0002] The large-scale development of new energy vehicles and the establishment of a green transportation system are an important way to solve the energy and environmental crisis. The Chinese government has always attached great importance to and strongly supported the research and development and industrialization of new energy vehicles. The "Made in China 2025" implemented by the Chinese government in May 2015 and the "Outline of the Thirteenth Five-Year Plan for National Economic and Social Development" promulgated in 2016 continue to list new energy vehicles as a major strategic development field and strategic industry. In 2016, the sales volume of new energy vehicles in my country reached 507,000, a year-on-year increase of 53%. The market scale ranks first in the world, and the number of new energy v...

AI Technical Summary

Problems solved by technology

[0014] In order to solve the above-mentioned problems, the present invention proposes a dual-layer active equalization circuit based on multiple input conversion (MIC) and its implementation method. It overcomes the problems of low equalization efficiency, slow equalization speed, and difficult modular expansion of traditional equalization circuits.

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