Fast Charge Strategy Based on the Characterization and Evaluation of LiFePO $_{\bm 4}$ Batteries
Fast Charge Strategy Based on the Characterization and Evaluation of LiFePO $_{\bm 4}$ Batteries
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DOI：
10.1109/tpel.2012.2209184
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发表时间：
2013-04
影响因子：
6.7
通讯作者：
Shyh-Jier Huang;Bo-Ge Huang;F. Pai
中科院分区：
文献类型：
--
作者：
Shyh-Jier Huang;Bo-Ge Huang;F. Pai
为了缩短充电时间，提高充电性能，提出了一种基于剩余能量评估的LiFePO4(LFP)电池快速充电策略。在该方法中，剩余能量模型是基于测量的相对于某一电荷值状态的终端电压来建立的。随后，利用获得的电压特性对LFP电池的储能进行了评估。然后计算完全存储的能量和剩余能量之间的差值，从而确定进行高倍率充电的合适时间，从而确保电池在稳定、安全和不过充电的条件下具有满容量。此外，对于可能影响电池电压评估的滞环效应，本文也将其纳入充电过程中。为了验证该方法的有效性，从充电时间、充电效率和充电循环次数的角度对该策略进行了检验。与其他充电策略相比，充电时间和充电效率都有了很大的提高，从而证实了该方法在储能应用中的可行性。
A rapid charge strategy based on the residual energy evaluation is proposed for LiFePO $_{4}$ (LFP) batteries to reduce charging time and improve charging performance. In the approach, the residual energy model was formulated based on the measured terminal voltage with respect to a certain state of charge value. Subsequently, the stored energy of an LFP battery was evaluated by using the obtained voltage characterizations. This is followed by the difference calculated between the fully stored energy and the residual energy such that the suitable time to enact the high-rate charge is determined, thereby ensuring a battery of full capacity in stable, safe, and nonovercharged conditions. Moreover, for the hysteresis effects that may affect the battery voltage evaluation, they are also included in the charge process in this study. In order to validate the method, this proposed strategy has been examined from perspectives of charge time, charge efficiency, and the number of charge cycles. Compared with other charge strategies, both the charge time and the charge efficiency are highly improved, hence confirming the feasibility of the method for energy storage applications.