磷酸铁锂电池碳纳米管膜加热结构设计及验证

Design and Validation of a Carbon-Nanotube Film Heating Panel for LiFePO_(4) Battery

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%。

For the problem of performance degradation in LiFePO_(4) batteries under low-temperature condi⁃tions,a lightweight,high-strength,low-voltage,safe,and energy-efficient Fiber Carbon-nanotube film Laminated heating structure for LiFePO_(4) battery is designed and developed,and experimental validation is conducted.The ther⁃mocompression technology is used to achieve the integrated molding of the Carbon-nanotube film and composite lam⁃inated structure.The experiment verifies the uniformity,stability and thermal fatigue resistance of a FCL(Fiber Car⁃bon-nanotube film Laminated composite)heater.Furthermore,heating experiments on LiFePO_(4) batteries in low-tem⁃perature 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%reduc⁃tion 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.