Power battery management system and method thereof

Abstract

The invention relates to an electrical design field and discloses a power battery management system and a method thereof. Estimation algorithm of cell state of charge (SOC), a heat management technology, a safety management and other new technologies are researched and implemented. The system in the invention comprises a safety management subsystem, a heat management subsystem, an optimization subsystem and the like. The safety management subsystem is used for monitoring charged states of cell monomers; determining whether the cell monomers are in discharge end states according to charged states of cell monomers and terminating cell discharges if the cell monomers are in discharge end states. The heat management subsystem is used for detecting temperatures of cell monomer surfaces; determining upper limits of temperature ranges in cell monomers according to temperature history information of cell monomer surfaces; determining temperature distribution information of a cell box consisting of all cell monomers; controlling an operating temperature of the battery according to temperature distribution information so that the operating temperature is in a range of preset temperatures. The optimization subsystem is respectively connected with the safety management subsystem and the heat management subsystem, and is used for controlling working states of the safety management subsystem and the heat management subsystem. In the invention, the safety management, the heat management and the like are applied in a management field of a power battery, which can improve safety performance, prolong service life, raise usage efficiency, give fully play to cell potential and guarantee the safety of using.

Description

technical field [0001] The invention relates to the field of electrical design, in particular to a management system and method for a power battery pack. Background technique [0002] With the highlight of energy issues, electric vehicles have become a new environment-friendly power tool. The power battery pack is a key component of electric vehicles, and its performance directly affects the power and economy of the vehicle. The battery management system is the bridge between the power battery and the whole vehicle. Configuring the battery management system can improve the performance and reliability of the power battery. [0003] Battery management technology is an indispensable technical guarantee for the use of electric vehicle power batteries. It is essential to ensure the safety of batteries, give full play to the performance of existing batteries, prolong life, and improve service efficiency, so as to meet the needs of safe and efficient work of electric vehicles and ...

AI Technical Summary

Problems solved by technology

Because battery SOC is affected by factors such as ambient temperature, self-discharge, cycle times, and inconsistency of battery packs, it is very difficult to estimate accurately. Therefore, the accuracy of SOC estimation using existing technologies is not high, and the system cannot be effectively estimated. manage

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