全钒液流电池堆旁路电流的计算及电堆优化  

Calculation of Shunt Current Distribution for All Vanadium Redox Flow Stack and Its Optimized Design

作　　者：禹争光[1] 郑谦[1] 师攀科[1] 

机构地区：[1]东方电气东方汽轮机有限公司,四川德阳618000

出　　处：《东方电气评论》2012年第2期5-7,共3页Dongfang Electric Review

摘　　要：采用对电堆内流道电路仿真计算的方法,分析了5kW级全钒液流电池堆在不同充、放电电流条件下,旁路电流的分布情况和对能量效率的影响。分析结果表明:(1)较大电流充放电有利于提高电堆理论库仑效率和能量效率,在50 A、100 A和200 A电流充电时,电堆理论库仑效率分别为:90.66%、95.2%和97.49%;(2)增加电堆中间隔板结构,有利于减少旁路电流,提高电堆能量效率;(3)对电极液框优化设计可以提高电堆库仑效率。Abstract： The eleetrical network model of shunt current distribution for the 5 kW class all vanadium redox flow staek is calculated, and then the shunt current values and effects on stack efficiency under three working states （ charge, diseharge and idle） are built in this paper. The results show that 1） the more charge or discharge the current value the higher columbic efficiency, with the columbic efficiency being 90.66%, 95.2% and 97.49% when charge current is 50, 100 and 200A respectively, 2） the diaphragm structure in middle of stack is helpful to cut down the shunt current and to improve its energy efficiency. 3） the optimum design on the stack frame is also an effective way to improve its energy efficiency.

关 键 词：钒液流电池堆 旁路电流 电堆优化 

分 类 号：TM911.4[电气工程—电力电子与电力传动]