Self-powered heating strategy for lithium-ion battery pack applied in extremely cold climates

被引：25
作者：
Huang, Deyang [1 ]
Chen, Ziqiang [1 ]
Zhou, Shiyao [1 ]
机构：
[1] Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai, Peoples R China
来源：
ENERGY | 2022年 / 239卷
关键词：
Lithium-ion batteries; Low temperature; Self-powered heating strategy; External heating structure; Battery thermal management; INTERNAL TEMPERATURE ESTIMATION; ELECTRIC VEHICLE; THERMAL MANAGEMENT; CHARGE ESTIMATION; SYSTEM; MODEL; PERFORMANCE; CELL; STATE;
D O I：
10.1016/j.energy.2021.122095
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Serious performance loss of lithium-ion batteries at subzero temperatures is the major obstacle to promoting battery system in cold regions. This paper proposes a novel heating strategy to heat battery from extremely cold temperatures based on a battery-powered external heating structure. The strategy contains two stages: preheating process for battery cold-start, and temperature holding process for battery temperature control after preheating. The strategy switches from the preheating to the temperature holding according to the power capability of battery pack. Both the electrical and thermal behaviors of battery pack are described based on equivalent circuit models, and the state-of-charge and state-of-power of battery pack are co-estimated online to support the implementation of the strategy. Systematic battery-in-the-loop tests are conducted for a series-connected battery pack to verify the effectiveness of the strategy at - 40 degrees C. Experimental results show that the battery pack can not only be heated from -41.4 degrees C to -14.0 degrees C in 371 s by consuming 6.1% of nominal capacity without being over-discharged, but also output 64.81% and 66.59% of nominal energy for loading the modified dynamic stress test cycles and the modified federal urban driving schedule cycles respectively after preheating. (C) 2021 Elsevier Ltd. All rights reserved.
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页数：15
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