本文基于多孔电极、电解液及集流体热物理性质的显著差异,考虑了钒离子透过膜对电池性能的影响,建立了全钒液流电池动态工作过程的非等温模型.与文献中的实验测量值相比,钒电池电压随时间变化的最大计算误差为2.91％,验证了模型的正确性.应用该模型,重点研究了正负电极与膜构成的区域,以及集流体区域的传热传质规律.结果表明,多次充放电循环后负极电解液钒离子总量增加而正极钒离子总量减少,电池容量降低.电池的电流密度对产热有较大影响,较大的电流密度下与外界达到热平衡时温度较高.此模型对发展大功率电池堆储能系统的有重要参考意义.
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