化工进展 ›› 2023, Vol. 42 ›› Issue (11): 5680-5688.DOI: 10.16085/j.issn.1000-6613.2023-0032

• 能源加工与技术 • 上一篇    下一篇

基于复合相变材料-热管耦合的电池散热性能

黄龙腾1(), 祁影霞1,2(), 王誉程1, 姜盛军3   

  1. 1.上海理工大学能源与动力工程学院,上海 200093
    2.上海市动力工程多相流动与传热重点实验室,上海 200093
    3.江苏嘉和热系统股份有限公司,江苏 扬州 225006
  • 收稿日期:2023-01-08 修回日期:2023-03-07 出版日期:2023-11-20 发布日期:2023-12-15
  • 通讯作者: 祁影霞
  • 作者简介:黄龙腾(1997-),男,硕士研究生,研究方向为新能源汽车热管理。E-mail:1602501538@qq.com
  • 基金资助:
    国家重点研发计划(2020YFF0303901);上海市动力工程多相流动与传热重点实验室项目(13DZ2260900)

Battery heat dissipation performance based on composite phase change material-heat pipe

HUANG Longteng1(), QI Yingxia1,2(), WANG Yucheng1, JIANG Shengjun3   

  1. 1.School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
    2.Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China
    3.Jiangsu Jiahe Thermal Systems Inc. , Yangzhou 225006, Jiangsu, China
  • Received:2023-01-08 Revised:2023-03-07 Online:2023-11-20 Published:2023-12-15
  • Contact: QI Yingxia

摘要:

针对18650三元锂电池在高倍率循环充放电时,电池组散热不及时导致电池组温度高于电池安全运行范围,引发自燃等安全问题,制备出石蜡-十六酸新型复合相变材料,并提出复合相变材料-热管(CPCM-HP)耦合的散热模式。当复合相变材料石蜡-十六酸混合比为3∶1时,散热效果最好,具备最低的相变温度43.3℃,相对纯石蜡降低了11.8%。3C放电时,CPCM-HP与复合相变材料(CPCM)散热系统相比,最高温度和最大温差分别降低了7.1℃、1.4℃。CPCM-HP散热模式在环境温度30℃,“3C放电-1C充电”模式下,维持电池组在46.5℃左右工作,并且整个循环过程中,最高温度不超过50℃,最大温差也控制在1.5℃以下,电池组始终保持在安全温度范围内。实验结果表明CPCM-HP比CPCM具有更好的散热性能。

关键词: 电池散热, 三元锂电池, 石蜡, 十六酸, 复合相变材料, 热管

Abstract:

For the 18650 ternary lithium battery in the high rate cycle charge and discharge, the battery pack temperature is higher than its safe operation range due to the untimely heat dissipation, which causes the safety problems such as spontaneous combustion. A new composite phase change material (CPCM) of paraffin-hexadecanoic acid was prepared, and the heat dissipation mode of the composite phase change material-heat pipe (CPCM-HP) coupling was proposed. When paraffin-hexadecanoic acid mixing ratio was 3∶1, the best heat dissipation effect was achieved, possessing the lowest phase change temperature of 43.3℃, which was reduced by 11.8% relative to pure paraffin. Under 3C discharge, the maximum temperature and maximum temperature difference of CPCM-HP were reduced by 7.1℃ and 1.4℃, respectively, compared with CPCM heat dissipation system. For CPCM-HP heat dissipation mode at 30℃ under the “3C discharge-1C charge” mode, the battery pack was maintained at about 46.5℃, the maximum temperature did not exceed 50℃ during the whole cycle, and the maximum temperature difference was controlled below 1.5℃, that is, the battery pack was always kept within the safe temperature range. The experimental results showed that CPCM-HP has better heat dissipation performance than CPCM.

Key words: battery heat dissipation, ternary lithium battery, paraffin, hexadecanoic acid, composite phase change material, heat pipe

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