Battery management and lossless equalization system

Abstract

Provide is a battery management and lossless equalization system which is used to manage and control the consistency of the monomer cells in an electric automobile battery. A charger is connected with a load through a power battery. A cell management module is in a cascade connection with a display unit, a central communication unit and a panel operation unit through a central processor. The central processor is connected to an electric automobile energy management system. It is possible to carry out a real-time on-site measurement on power battery total voltage, total current and various parameters of the monomer cells and carry out estimation on the inconsistency of the monomer cells. A dynamic on-site lossless equalization is carried out to charging, discharging and standing of the monomer cells. Meanwhile, necessary control is implemented to ensure the safety of the battery and prolong the service life of the battery. According to the invention, the inconsistency of the monomer cells can be equalized, there is no energy loss, the equalization efficiency is high, the equalization effect is good, the inconsistency difference of the voltages of the monomer cells is less than 20mv and the precisions of voltage measurement and temperature measurement are high.

Description

technical field [0001] The invention relates to the technical field of automation, in particular to a battery pack management and non-destructive equalization system for managing and controlling the consistency of individual cells in an electric vehicle battery pack. Background technique [0002] The battery management of the battery pack refers to the real-time detection and estimation of the state of each single battery in the battery pack (including temperature, voltage, current, maximum available capacity, consistency, etc.), to reduce the difference between the batteries in the battery pack, and to prevent the Inconsistency spreads, and accordingly provides an optimized usage method for the battery pack to ensure its safety and long life. Energy shortage and environmental protection crisis force the Chinese market to urgently develop and produce new energy electric vehicles, and the bottleneck in the development of electric vehicles lies in batteries. Due to the advanta...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing lithium-ion battery packs that cannot automatically adjust and control the inconsistency of the various parameters of the single battery, the purpose of the invention is to provide a battery pack management and non-destructive equalization system, through the power battery pack Various parameters of the single battery are measured online in real time, and then the inconsistency of each single battery is estimated. The non-destructive equalization circuit in the system implements dynamic online equalization of the single battery, and at the same time implements necessary controls to achieve improved battery performance. The safety performance of the group, the purpose of prolonging its service life

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