Experimental investigation of aluminum nitride/carbon fiber‐modified composite phase change materials for battery thermal management

Abstract

The phase change material is currently being regarded as an effective cooling media to be applied in the thermal management of lithium batteries-powered vehicles, in which the inorganic hydrate phase change material is desirable and widely investigated due to the high thermal conductivity, latent heat value, and low cost. However, when applied to thermal energy storage applications, supercooling and phase separation are problematic. To effectively circumvent this issue, this work considers utilizing the disodium hydrogen phosphate dodecahydrate as the matrix of the composite phase change material, as the phase transition temperature is suitable for the battery's operating temperature range. Meanwhile, the nucleating agent sodium metasilicate nonahydrate with similar lattice parameters and the thickener carboxymethyl cellulose are used to suppress the supercooling and eliminate the phase separation, respectively. Effects of nucleating agent, surface modified aluminum nitride, and short-cut carbon fiber on the supercooling degree, and thermal conductivity and curing performance in the phase change material are evaluated and discussed in detail to determine the optimal preparation scheme for Na 2 HPO 4 Á12H 2 O/modified AlN/CF inorganic composite phase change materials. Experimental results show that the addition of 4 wt% Na 2 SiO 3 Á9H 2 O, 4 wt% CMC, 12 wt% modified AlN, and 6 wt% CF reduces the supercooling

Experimental Investigation of a Battery Thermal Management Device Based on a Composite Phase Change Material Coupled with a Double Helix Liquid Cooling Plate

“…The modified CPCM has an appropriate phase change temperature (35 °C), and although the latent heat of the phase change value is decreased from the original 250 to 249 J/g, the doping of 6 wt % CF and 12 wt % AlN can increase the thermal conductivity into 1.86 W/(m·K). The phase separation phenomena and subcooling are also suppressed, and the resistivity of the whole material can be increased from 21.1 to 64.5 Ω at 0.5 V, which further improves the safety of the use process …”

“…The phase separation phenomena and subcooling are also suppressed, and the resistivity of the whole material can be increased from 21.1 to 64.5 Ω at 0.5 V, which further improves the safety of the use process. 48 In the early stage of the experiment, the amount of CPCM should be determined according to the maximum heat generation for the battery pack. Assuming that Q 1 represents the maximum heat generation for the Li-ion battery and Q 2 represents the heat storage for the CPCM under ideal conditions, the energy relationship can be expressed as follows (1) (2)…”

“…On the other hand, while hybrid BTMSs can obtain better cooling performance, the rationality of the coupling and component light-weighting must be optimized. To solve those problems and improve the comprehensive performance of the cooling system, aluminum nitride/carbon fiber-modified composite PCMs for battery thermal management were prepared in our previous study . In the present work, a new double helix-type liquid cooling plate is developed and coupled with a hydrated salt CPCM for battery pack cooling.…”

“…To solve those problems and improve the comprehensive performance of the cooling system, aluminum nitride/carbon fiber-modified composite PCMs for battery thermal management were prepared in our previous study. 48 In the present work, a new double helix-type liquid cooling plate is developed and coupled with a hydrated salt CPCM for battery pack cooling. Compared with the common liquid cooling plate structure, the cooling structure designed in this work can make the average water temperature value in the plates similar on both sides of each battery.…”

Preparation and Application of Aluminum-Phenylphosphinate-Encapsulated Phase Change Materials for Thermal Management of Lithium-Ion Batteries

“…Therefore, PCM heat dissipation is gradually developed with the advantages of no external energy consumption and easy assembly and maintenance compared to liquid cooling heat dissipation. PCM is a kind of material that can absorb or release large amounts of energy during the phase transition at the appropriate temperature, which has received more and more attention in the field of battery thermal management . Composite phase change materials (CPCMs) are further prepared by combining PCM with other substances to obtain better physical and chemical properties, such as expanded graphite (EG), graphene, carbon fibers, carbon nanopowders, copper powders and other highly thermally conductive nanoparticles, which are often added to improve the thermal conductivity of PCM. − Wu et al prepared CPCM by adding 20% of pretreated expanded graphite to the melted paraffin (PA).…”