动力电池老化诱发热失控机理仿真

动力电池老化诱发热失控机理仿真

陈桂泉, 沙盈吟, 赵威风, 邓业林

Simulation study on the mechanism and process of thermal runaway induced by aging of lithium-ion batteries

Guiquan CHEN, Yingyin SHA, Weifeng ZHAO, Yelin DENG

表7 COMSOL内置函数

Table 7 Functions in COMSOL

方程	函数
固相导电	$\frac{\partial}{\partial x} (σ_{i}^{e f f} \frac{\partial}{\partial x} ϕ_{s}) = j_{t o t}$
固相传质	$\frac{\partial c_{s}}{\partial t} = \frac{D_{s, i}}{r^{2}} \frac{\partial}{\partial r} (r^{2} \frac{\partial c_{s}}{\partial r})$
液相导电	$\frac{\partial}{\partial x} (κ^{e f f} \frac{\partial}{\partial x} ϕ_{e}) = - \frac{\partial}{\partial x} (κ_{D}^{e f f} \frac{\partial}{\partial x} l n c_{e}) - j_{t o t}$
液相传质	$\frac{\partial}{\partial t} ε_{e, i} c_{e} = \frac{\partial}{\partial x} (D_{e, i}^{e f f} \frac{\partial c_{e}}{\partial x}) + \frac{(1 - t^{+}) j_{t o t}}{F}$
电极-电解液界面反应	$j_{i n t} = a_{s, i} i_{0, i} \{e x p (\frac{α_{a, i n t} F}{R T} η_{a c t, i n t}) - e x p (\frac{α_{c, i n t} F}{R T} η_{a c t, i n t})\}$