锂离子电池寿命预测模型

来源:锂电闲文

锂离子电池寿命预测资料供大家参考<Predictive Models of Li-ion Battery Lifetime>

锂离子电池寿命预估是个复杂的系统，文中通过多尺度、多维度（粒子维度、极片维度、电池维度）考虑预测电池寿命。

电化学工作窗口

电化学工作窗口的衰减

负极的衰减（SEI膜形成→溶剂共嵌入→SEI重建→析锂→die）

正极的衰减（集流体腐蚀，导电剂氧化，粘结剂分解，正极材料裂纹，正极材料Mn等元素溶出）

受力致使的衰减

长程多维度的衰减机制

微结构应力模型

微观尺度的应力致使的衰减

NREL寿命预测模型

拐点对寿命预测至关重要？

最优化的充电策略：

Summary

• Main factors controlling battery lifetime

• Time at high T & SOC (weak coupling with DOD & C-rate)
• Cycling at high DOD & C-rate; Low/high T & SOC

• Semi-empirical battery lifetime models are generally suitable for system design & control

• NREL models describe various commercial chemistries
• Life extensions of 20% to 50% may be possible

• Physics lifetime models to provide design feedback

• Electrochemical/thermal processes well understood
• Mechanics coupling underway at various length scales

引用自：KandlerSmith,