Experimental study on pulse self-heating of lithium-ion battery at low temperature
Experimental study on pulse self-heating of lithium-ion battery at low temperature
复制标题
锂离子电池低温脉冲自加热实验研究
DOI：
10.1016/j.ijheatmasstransfer.2019.02.020
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发表时间：
2019
影响因子：
5.2
通讯作者：
Wang Q.
中科院分区：
文献类型：
--
作者：
Qu Z. G.;Jiang Z. Y.;Wang Q.
电池低温升温是影响电池热管理的关键问题。在这项研究中，提出了脉冲自加热策略，以实现锂离子电池在低温下快速、安全的升温。电池通过脉冲自放电进行加热。该策略可以通过控制电路对18650商用电池进行加热，并减轻加热过程中电池的劣化。与连续直流自加热相比，脉冲加热可在175s内将电池从-10°C加热到10°C，而直流加热在接近极化电压的情况下需要280s。进一步研究了环境温度、开关间隔和初始充电状态对加热性能的影响。发现加热持续时间对研究范围内的切换间隔不敏感。相反，不同环境温度和初始充电状态下的电池内阻和关断电压是影响加热持续时间的主要因素。在-10°C至0°C的环境温度下可实现150-180秒的加热持续时间。在实际应用中，建议在较高的初始充电状态（>0.8）下进行脉冲加热，加热持续时间在200秒以内。
Battery warming at low temperature is a critical issue affecting battery thermal management. In this study, the pulse self–heating strategy is proposed to enable quick and safe warming of lithium–ion battery at low temperature. The battery is heated up using pulse self–discharge. This strategy can heat up 18,650 commercial battery with a control circuit and alleviate the battery degradation during heating. Compared with continuous direct current self–heating, the battery can be heated up from −10 °C to 10 °C by pulse heating within 175 s while the direct current heating consumes 280 s with approximating polarization voltage. The effects of ambient temperature, switching interval, and initial state–of–charge on heating performance are further investigated. Heating duration is found to be insensitive to the switching interval in the studied range. Conversely, battery internal resistance and off–period voltage at different ambient temperatures and initial state–of–charges are found to be the predominant factors that influence heating duration. Heating duration in the range of 150–180 s is achieved at ambient temperature ranging from −10 °C to 0 °C. In real applications, pulse heating is recommended to be performed at higher initial state–of–charge (>0.8), at which heating duration is within 200 s.