基于电化学-热耦合的4680电池模拟研究  

Simulation of 4680 battery using electrochemical-thermalcoupling model

作　　者：王晓萌 丁飞 杨晓光 张睿[3] WANG Xiaomeng;DING Fei;YANG Xiaoguang;ZHANG Rui(State Key laboratory of Reliability and Intelligence of Electrical Equipment,School of Electrical Engineering,Hebei University of Technology,Tianjin 300130,China;National Engineering Research Center of Electric Vehicles,Beijing Institute of Technology,Beijing 100081,China;School of Materials Science and Engineering,Tianjin University,Tianjin 300354,China)

机构地区：[1]河北工业大学电气工程学院省部共建电工装备可靠性与智能化国家重点实验室,天津300130 [2]北京理工大学电动车辆国家工程研究中心,北京100081 [3]天津大学材料学院,天津300354

出　　处：《电源技术》2023年第12期1567-1573,共7页Chinese Journal of Power Sources

基　　金：河北省全职引进高端人才科研项目(2020-HBQZYC017);河北省自然基金青年项目(E2022202181)。

摘　　要：针对特斯拉4680电池,通过建立动态响应参数的电化学热耦合模型,研究其在不同倍率、不同环境温度下的热特性,并进一步分析电池内部的产热机理。研究发现高放电倍率和低温环境加剧了电池内部的温度不均匀性;高倍率放电下,集流体的欧姆产热占有绝对优势,而4680电池全极耳的设计,则有效改善了传统极耳情况下集流体产热过大的问题,降低了电池的内外温差。该研究对评价锂离子电池的热特性及电池组热管理系统的设计具有重要的参考价值。The thermal characteristics of Tesla 4680 battery at different rates and ambient temperatures were studied based on an electrochemical-thermal coupling model.The heat generation mechanism of the battery was analyzed.It is found that high discharge rate and low ambient temperature would aggravate the thermal nonuniformity inside the battery.Ohmic heat dominates the heat generation during high rate discharge.4680 battery with“tables”configuration effectively reduces the heat production of the current collector at high rate,and reduces the internal and external temperature difference of the battery.This work can provide a basis for evaluating the thermal characteristics of lithium ion batteries and design optimization of thermal management system of power battery pack.

关 键 词：锂离子电池 4680电池 电化学热耦合模型 热特性 

分 类 号：TM912[电气工程—电力电子与电力传动]