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通过对LiFePO4锂离子电池循环寿命实验,发现电池在不同充放电制度下的循环寿命差异很大。研究发现,单体电池充电终止电压应该在3.65 V左右,超过4.0 V会造成电池循环寿命的严重衰减。单体电池放电截止电压应该尽可能高,应大于2.5 V;充电倍率越高,电池循环寿命越低。在电池组的实际使用中,应该综合考虑这些因素,并采取有效的措施以延长电池组的使用寿命。
Abstract：Lithium iron phosphate(LiFePO4) was used as cathode material to study the cyclic life of Li-ion batteries.It was found that the cyclic life of Li-ion batteries was straightly dependent on the charge-discharge modes.The charge cutoff voltage of single cells should be 3.65 V.If it exceeded 4.0 V,the cyclic life of the cells would decay seriously.The discharge cutoff voltage of Li-ion single cells should be higher than 2.5 V.The cyclic performance of Li-ion batteries were destroyed with the increasing of the charge rates.In practical applications,the above factors should be considered,and some measures should be taken to improve the cyclic life of Li-ion batteries.
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基本信息:
中图分类号:TM912.9
引用信息:
[1]闻人红雁.放电制式对锂离子电池循环寿命的影响[J].电池工业,2011,16(06):325-328.