加速量热仪在锂离子电池热测试中的应用  

Application of Accelerating Rate Calorimeter in the Lithium-ion Battery Thermal Test

作　　者：刘恒伟[1] 李建军[1] 谢潇怡[1] 方谋[1] 王莉[1,2] 何向明[1,3] 欧阳明高[2] 李茂刚 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084 [2]清华大学汽车安全与节能国家重点实验室,北京100084 [3]江苏华东锂电技术研究院,张家港215600 [4]瑞典凯戈纳斯有限公司上海代表处,上海200120

出　　处：《集成技术》2015年第1期51-59,共9页Journal of Integration Technology

基　　金：国家973计划(2011CB935902;2013CB934000);国家863计划(2013AA050903;2011AA11A257);科技部国际合作(2010DFA72760);清华大学自主科研计划(2010THZ08116;2011THZ08139;2011THZ01004;2012THZ08129);汽车安全与节能国家重点实验室基金(ZZ2012-011);清华大学苏州汽车研究院(吴江)基金(2012WJ-A-01)

摘　　要：利用绝热加速量热仪提供绝热环境,研究了三元软包锂离子动力电池在不同倍率充放电时的发热行为。锂离子电池内部的总热量由可逆的熵变热和不可逆的焦耳热组成。进一步研究结果表明,电池发热量的大小主要由充放电倍率决定：低倍率充放电时电池发热量较小,0.2 C倍率时电池温度上升7.16℃,熵变热有明显的体现;高倍率充放电时焦耳热占主导地位,熵变热几乎可以忽略,1 C倍率时电池温度上升25.63℃。同一倍率下放电过程发热量大于充电过程,放电过程中电池荷电状态为0~10%时,直流内阻突然增大,此处电池发热功率最大。该研究对锂离子电池热管理的散热设计有一定的参考价值。In this work the thermal behavior of the LiNi1/3Co1/3Mn1/3O2 cathode material for soft packed lithium-ion power batteries during charging and discharging at different C-rate were conducted using the ARC （accelerating rate calorimeter） to provide an adiabatic environment. The overall heat generated by the lithium-ion battery during use, is partly reversible and partly irreversible, due to entropy change and joule heating, respectively. It indicates that the heatinggeneration of lithium-ion cell is decided and discharge. For example, the heating by the C-rate of charge and discharge generation of battery increases 7.16 ℃ The heat is smaller at low C-rate of charge at 0.2C-rate and the entropy change heat is clearly embodied. The joule heating is more remarkable than the entropy change during charging and discharging at high C-rate. For instance, the heating generation of cell increased 25.63 ℃ at 1C-rate. The heat generation of charge is less than discharge at the same C-rate. The DC inter insistence of cell at the SOC （State of Charge） of 0 to 10% increases suddenly, so the heating generation power will reach its maximum in this period during discharge. It is valuable for the design of heat dissipation in lithium-ion battery thermal management.

关 键 词：锂离子电池 发热量 熵变热 焦耳热 热管理 

分 类 号：TM912[电气工程—电力电子与电力传动]