加速量热仪在锂离子电池热测试中的应用
加速量热仪在锂离子电池热测试中的应用
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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)

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

    Abstract:

    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 heating generation of lithium-ion cell is decided by the C-rate of charge and discharge. The heat is smaller at low C-rate of charge and discharge. For example, the heating generation of battery increases 7.16℃ 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.

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引文格式
刘恒伟,李建军,谢潇怡,方 谋,王 莉,何向明,欧阳明高,李茂刚.加速量热仪在锂离子电池热测试中的应用 [J].集成技术,2015,4(1):51-59

Citing format
LIU Hengwei, LI Jianjun, XIE Xiaoyi, FANG Mou, WANG Li, HE Xiangming, OUYANG Minggao, LI Maogang. Application of Accelerating Rate Calorimeter in the Lithium-ion Battery Thermal Test[J]. Journal of Integration Technology,2015,4(1):51-59

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  • 在线发布日期: 2015-01-28
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