Distributed battery management system (BMS) based on three-layer CAN (controller area network) network and self-powered characteristic

Abstract

The invention relates to a distributed battery management system (BMS) based on a three-layer CAN (controller area network) network and a self-powered characteristic. The BMS comprises a BMS main control module, a voltage-temperature detection module, a high-voltage management module, an insulation detection module, a current detection module and a group of BMS external interfaces. The BMS is characterized in that a main controller built-in a three-layer CAN communication module embedded in a main controller in the BMS main control module is formed by expansion of the main controller in the main control module by virtue of bus-mastering, and the BMS main control module respectively carries out data communication together with a finished automobile controller, the voltage-temperature detection module and a charger through the three-layer CAN communication module. The BMS provided by the invention has the advantages that a three-layer CAN network structure is adopted, so that the reliability and stability of the BMS are improved, thereby improving the efficiency of the BMS; a voltage-current collection plate self-powered technology is adopted, so that the power consumption of the BMS and the system wiring simplified; and the high-voltage management module adopts a pre-charging method, thus the impact on the vehicle-mounted load and the battery bags is reduced.

Description

technical field [0001] The invention belongs to the field of electronic technology and relates to a battery management system for electric vehicles. Specifically, it is a distributed battery management system based on a three-layer CAN network and self-powered. Background technique [0002] In the face of the environmental problems caused by the pollution caused by the exhaust emissions of traditional fuel vehicles, electric vehicles have become one of the trends and hot spots in the development of international automobiles due to their good environmental protection and energy-saving characteristics. Batteries are an important part of electric vehicles. The battery management system, which plays a key role in battery performance, has been valued by many governments, automobile companies and scientific research institutions in related industries, and has been researched, developed and promoted. [0003] At present, people have made important efforts to increase battery life,...

AI Technical Summary

Problems solved by technology

[0004] Generally speaking, in recent years, battery management system technology has been greatly improved, and many aspects have entered the stage of practical application, but some parts are still not perfect, not very mature, especially in the transmission and reception of large amounts of data in the entire communication network The reliability and stability of high-voltage management and the safety of high-voltage management need to be further improved and improved. The design and application of low-power acquisition boards realized by self-powered technology in battery management systems have not involved

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