CAJ | 학술논문

动力电池的寿命影响电动汽车整车的使用。该文参照美国能源部的燃料电池汽车协作计划FreedomCAR等,结合中国整车动力蓄电池典型工况,以金属氢化物镍动力蓄电池和锰酸锂体系的锂离子动力电池为例,用常规循环和工况法结合来测试评价动力电池的循环特性,确定了电池循环寿命衰减的拟合公式。结果表明：该镍氢动力电池容量衰减符合一次指数衰减变化规律,锰系锂离子动力电池容量衰减遵循1/2次方变化规律。利用该衰退模型可以预测电池的失效寿命,有助于后期建立寿命加速预测方法。
동력전지적수명영향전동기차정차적사용。해문삼조미국능원부적연료전지기차협작계화FreedomCAR등,결합중국정차동력축전지전형공황,이금속경화물얼동력축전지화맹산리체계적리리자동력전지위례,용상규순배화공황법결합래측시평개동력전지적순배특성,학정료전지순배수명쇠감적의합공식。결과표명：해얼경동력전지용량쇠감부합일차지수쇠감변화규률,맹계리리자동력전지용량쇠감준순1/2차방변화규률。이용해쇠퇴모형가이예측전지적실효수명,유조우후기건립수명가속예측방법。
Cycle life of power battery has a direct effect on the use of electric vehicles. This paper investigates the life prediction methods by inducing cycle life degradation model of power battery based on nickel-metal hydride batteries and manganese-based lithium ion batteries. Batteries were tested with reference of the test method of FreedomCAR, the U.S. Department of Energy＇s fuel cell vehicles development programs, and combined with the conventional power battery operating condition of China. Life decay way was studied with the combination of normal cycle and bus cycle, with the fitting formula of battery cycle life attenuation being determined. The results show that the Ni-MH battery and Li-ion battery capacities fade with cycle number followed an exponential decay distribution and the 1/2 power change path respectively. The cycle life model and reliability evaluation method are helpful for battery life prediction and establishing an accelerated cycle life prediction model.