锂离子电池连续非均匀充放电热响应特性及协同控制策略研究

项目名称： 锂离子电池连续非均匀充放电热响应特性及协同控制策略研究

项目编号： No.51206175

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 工程热物理与能源利用学科

项目作者： 宋文吉

作者单位： 中国科学院广州能源研究所

项目金额： 25万元

中文摘要： 锂离子电池的热安全性是制约其应用的主要瓶颈之一。在平滑功率输出的应用中，锂离子电池长期处于连续的、变倍率电流的浅充浅放状态，电池热响应特性以及内部热量的"积聚-释放"规律尚不明确。本项目以大容量锂离子电池为研究对象，采用电池测试设备与量热仪联动的实验手段，揭示锂离子电池随荷电状态、充放电电流倍率、操作温度等参数变化的生热规律；采用数值模拟的方法，获得电池内部温度分布随局部电位、电流密度分布等的变化规律；建立耦合电分析化学和传热学的热预测模型，并以协同控制思想为指导，建立一套应对电池系统热响应特性的控制策略。本项目的特色在于，从传热学和电分析化学角度揭示锂离子电池连续浅充浅放状态下的热响应特性，基于热预测模型获得多因素的协同控制策略，为解决锂离子电池储能系统的热安全性问题提供理论支持和设计指导。

中文关键词： 锂离子电池；生热速率；非均匀充放电；热预测模型；协同控制

英文摘要： The thermal safety of Li-ion battery is one main obstacle for electric vehicles and large-scale energy storage applications. The heat generation characteristics and heat accumulation-release performances under continuously inhomogeneous charge-discharge process are not clear.In this project,taking the high capacity Li-ion battery as primary object，its heat responding characteristics would be analyzed with battery test equipment and calorimeter, and its heat generation rate would be explored based on experiments under the conditions of state of charge(SOC), charge-discharge current rate and operation temperature. The battery internal temperature distribution as a function of the local potential and current density distribution would be studied by numerical simulation method. One thermal prediction model would be developed, in which coupled with electrochemical method and heat transfer theory. one practical coordination control strategy would be established to cope with thermal safty of Li-ion battery energy storage system.The characteristics of this project is to explore the thermal responding characteristics of Li-ion battery at the state of continuously inhomogeneous charge and discharge, and obtain multi-parameter of coodination control strategy. The research report will provide theoretical support and design

英文关键词： li-ion battery；heat generation rate；inhomogeneous charge-discharge；thermal prediction model；coordination control