Modeling for the scale-up of a lithium-ion polymer battery

Thermal conductivity and internal temperature profiles of Li-ion secondary batteries

“…In particular, there is not that many reports on thermal conductivity of separators. In the literature, we find values for separators, but these values vary from 0.33-1.29 WK −1 m −1 [19][20][21][22]. Some of these values are assumed and there are almost no reports on the experimental determination of the cross-plane thermal conductivity of a separator.…”

“…In case of the LFP | graphite and the LCO | graphite cell, we used the graphite anode from Hohsen. To show the importance of the thermal conductivity of the separator, we finally calculated the maximum temperature in the centre of the battery for the same cell chemistries, using k s a.m. = 1 Wm −1 K −1 for the separator like Kim et al [21]. The results are given in Figure 7.…”

“…At a discharge rate of 10C, we find a difference of more than 8 K from the edge to the center. Using the higher thermal conductivity for the separator of 1 Wm −1 K −1 [21] the effective thermal conductivity of the whole cell (see equation 5) increased and, therefore, lowered the maximum temperature. Table 6 showes the effective thermal conductivities for the batteries modelled in Fig.…”

Modeling the Effects of the Cathode Composition of a Lithium Iron Phosphate Battery on the Discharge Behavior

“…By not calculating the distributions of the lithium ion concentration and electrolyte-phase potential, the model of Kwon et al [23] significantly saves computation time as compared to the rigorous porous electrode model, while maintaining the validity of the model, even at high discharge rates. Kim et al [24][25][26] performed two-dimensional thermal modeling to predict the thermal behavior of a LIB cell during discharge and charge on the basis of the potential and current density distributions obtained by the same procedure used by Kwon et al [23]. They reported good agreement between the modeling results and the experimental data.…”

“…They reported good agreement between the modeling results and the experimental data. Kim et al [27] extended their thermal model [24][25][26] to accommodate the dependence of the discharge behavior on the environmental temperature.…”