Thermal instability has severely limited the wide application of the lithium ion batteries. In this work, a thermo‐mechanical coupling model of cylinder lithium‐ion batteries (LIBs) with the thermal radiance effect is developed in generalized plane strain condition, which is two‐way coupling. Then, taking 18 650 LIBs as the object, some numerical calculations are implemented to discuss the impacts of initial temperature, discharge current, heat convection coefficient, thermal emissivity and internal resistance upon the distributions of temperature, radial and hoop stresses during charge or discharge. Numerical results show that the maximum temperature in LIBs will decrease when the initial temperature, discharge current, and internal resistance decrease or heat convection coefficient and the thermal emissivity increase. Finally, two comparisons are made to indicate that (1) the temperature in the coupled model is lower than that in the thermal model and (2) the thermal radiation effect plays a vital role in the temperature and stresses, and it can effectively reduce the temperature.

中文翻译：

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广义平面应变条件下具有热辐射效应的圆柱形锂离子电池的热力耦合分析

热不稳定性严重限制了锂离子电池的广泛应用。在这项工作中，开发了在广义平面应变条件下具有热辐射效应的圆柱锂离子电池（LIB）的热力耦合模型，该模型为双向耦合。然后，以18 650 LIB为对象，进行了一些数值计算，讨论了初始温度，放电电流，热对流系数，热发射率和内阻对充电或放电过程中温度，径向和环向应力分布的影响。数值结果表明，当初始温度，放电电流和内阻减小或热对流系数和热发射率增加时，LIBs的最高温度将降低。最后，