磷酸铁锂电池碳纳米管膜加热结构设计及验证

doi:10.19562/j.chinasae.qcgc.2024.11.013

摘要/Abstract

摘要：

针对磷酸铁锂电池低温环境下的性能衰减问题，设计开发了一种轻质高强、低压安全、高效节能的磷酸铁锂电池抗低温纤维碳纳米管膜加热功能结构并开展了实验验证。采用热压工艺实现了碳纳米管薄膜与复合材料层合结构的一体化成形。实验验证了FCL（fiber carbon-nanotube film laminated composite）加热器良好的温度均匀性、稳定性以及抗热疲劳性能。开展了低温环境下磷酸铁锂电池加热实验，并与传统的PTC（positive temperature coefficient）加热器进行了对比分析，结果表明：相较于传统的PTC加热器，FCL加热器质量减轻了59%，能量消耗降低了3.5%，温升效率提高了26%，功率质量比提升了195%。

关键词: 磷酸铁锂电池, 纤维碳纳米管膜复合材料, 抗低温性能, 功能结构

Abstract:

For the problem of performance degradation in LiFePO₄ batteries under low-temperature conditions， a lightweight， high-strength， low-voltage， safe， and energy-efficient Fiber Carbon-nanotube film Laminated heating structure for LiFePO₄ battery is designed and developed， and experimental validation is conducted. The thermocompression technology is used to achieve the integrated molding of the Carbon-nanotube film and composite laminated structure. The experiment verifies the uniformity， stability and thermal fatigue resistance of a FCL （Fiber Carbon-nanotube film Laminated composite） heater. Furthermore， heating experiments on LiFePO₄ batteries in low-temperature environments are carried out， which is compared with the traditional Positive Temperature Coefficient （PTC） heater. The results show that compared to the traditional PTC heater， the FCL heater exhibits a 59% reduction in weight， a 3.5% decrease in energy consumption， a 26% improvement in temperature rise efficiency， and a 195% increase in power-to-weight ratio.

Key words: LiFePO₄ battery, fiber carbon-nanotube film laminated composite, low temperature resistance, functional structure

唐超,岑志雄,殷正翰,王海瑞,袁培毓,谢宗蕻. 磷酸铁锂电池碳纳米管膜加热结构设计及验证[J]. 汽车工程, 2024, 46(11): 2068-2075.

Chao Tang,Zhixiong Cen,Zhenghan Yin,Hairui Wang,Peiyu Yuan,Zonghong Xie. Design and Validation of a Carbon-Nanotube Film Heating Panel for LiFePO₄ Battery[J]. Automotive Engineering, 2024, 46(11): 2068-2075.

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对比内容	PTC加热器	FCL加热器	变化比例/%
供电电压/V	93	32	-65.6
平均功率/W	140.5	170.6	24.4
消耗能量/（W·h）	153.8	148.5	-3.5
温升效率/（℃·h^-1）	16.1	20.3	26.0
质量/g	226.9	93.2	-59.0
功率质量比/（W·g^-1）	0.62	1.83	195.0