在不同温度（35℃、45℃、55℃）、不同倍率（0.5 C、1 C、1.5 C）下进行磷酸铁锂-石墨电池的循环寿命测试，研究这些加速因子对循环寿命的影响，构建加速模型。研究结果表明，在不同加速因子下的循环测试均出现容量跳水现象，容量衰减曲线符合双幂次函数。基于双幂次函数对容量衰减曲线进行拟合，提取寿命特征参数，建立电池在温度和倍率条件下的加速模型。不同温度下，寿命特征参数与温度符合阿伦尼乌斯关系；不同倍率下，寿命特征参数的对数与倍率符合线性关系。利用加速模型可得到电池在低加速条件下的衰减规律，可提前预测电池的循环寿命，温度加速模型和倍率加速模型的误差分别为7.4%和4.0%。

The cycle life test of lithium iron phosphate-graphite batteries was conducted under different temperatures(35 ℃, 45 ℃, 55 ℃) and different rates(0.5 C, 1 C, 1.5 C) to study the influence of these acceleration factors on the cycle life and establish an accelerated model. The research results show that the capacity plunge occurs under different acceleration conditions, and the capacity fading curves conform to the double-power law function. Based on the double-power law function, fitted the capacity fading curves, and the cycle life characteristic parameters are extracted to establish the accelerated model of the battery. At different temperatures, the life characteristic parameters and temperature conform to the Arrhenius relationship. Under different rates, the logarithm of the life characteristic parameters and the rate conform to a linear relationship. By using the acceleration model, the attenuation law of the battery under low acceleration factors can be obtained, and the cycle life of the battery can be predicted. The errors of the temperature acceleration model and the rate acceleration model are 7.4% and 4.0%, respectively.