软件定义可重构电池系统及其应用

摘要

自电池被发明200多年以来,电池系统一直是采用固定串并联的系统架构,即很多小容量的单体电池根据负载的要求固定串并联成一个电池系统.然而,由于生产和工况引入的单体电池差异性,这种固定串并联的系统架构给电池系统带来了很多应用上问题,如SOC和SOH的测不准问题、电池充放电均衡问题、电池的梯次利用问题及可靠性和安全性问题等.借鉴软件定义的理念和具体实现,软件定义可重构电池系统可以从根本上解决电池单体差异性与固定串并联成组方式之间的不匹配问题,进而解决了一系列电池应用问题.本文将重点讨论基于可重构电池网络的软件定义可重构电池系统原理及其应用.%Since battery was invented,the fixed series-parallel battery cell connection has not been changed over 300 years.However,due to the existence of cell difference,this fixed series-parallel cell connection brings up many application problems,such as energy conversion efficiency,SOC and SOH estimation,cell balance of battery charge and discharge,safety and reliability.With the inspiration of software-defined concept,in this paper,a software-defined battery system based on dynamic reconfigurable battery network will be proposed in detail.In software-defined battery system,the battery cell topology can be dynamically reconfigured in the real-time fashion based on the states of battery cells and the working condition of a battery system.Therefore,the aforementioned battery application problems will be solved under the technical framework of software-defined battery.