基于电化学-热耦合模型的锂离子电池组件产热分析

基于电化学-热耦合模型的锂离子电池组件产热分析

杨佳兴, 张恒运, 徐屹东

Heat generation analysis for lithium-ion battery components using electrochemical and thermal coupled model

Jiaxing YANG, Hengyun ZHANG, Yidong XU

表5 变温电化学动态参数

Table 5 Variable temperature electrochemical dynamic parameters

参数	动态表达式
等效电解液电导率 к /(S/m)	$κ (c_{r e f}, T) = 10^{- 4} c_{r e f} {(\begin{array}{l} - 8.2488 + 0.053248 T - 0.00002987 T^{2} + \\ 0.26235 \times 10^{- 3} c_{r e f} - 0.0093063 \times 10^{- 3} c_{r e f} T + \\ 0.000008069 \times 10^{- 3} c_{r e f} T^{2} + \\ 0.22002 \times 10^{- 6} c_{r e f}^{2} - 0.0001765 \times 10^{- 6} c_{r e f}^{2} T \end{array})}^{2}$
锂离子固相扩散系数D_s/(m²/s)	$D_{s} = {D_{s}}_{, r e f} e x p [\frac{E_{a R}}{R} (\frac{1}{T_{r e f}} - \frac{1}{T})]$
锂离子液相扩散系数D_l/(m²/s)	$l g [D_{l} (c_{r e f}, T)] = {(- 4.43 - \frac{54}{T - 229 - 0.005 c_{r e f}} - 0.00022 c_{r e f})}^{- 4}$
活性系数ν(f_±, t₊)	$ν (c_{r e f}, T) = \frac{1 - 0.363}{1 - 0.399} \{\begin{array}{l} 0.601 - 0.24 \times 10^{- 2} c_{r e f}^{0.5} + \\ 0.982 \cdot [1 - 0.0052 (T - 293.15)] \cdot (10^{- 3} c_{r e f})^{1.5} \end{array}\}$