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How Depth of Discharge Affects the Cycle Life of Lithium-Metal-Polymer Batteries

机译:如何放电深度影响锂金属 - 聚合物电池的循环寿命

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Batteries used as energy storage in telecommunications applications do not usually cycle over their full rated capacity. These batteries spend most of the time floating at full charge, and during discharges, only a fraction of the battery capacity is used depending on the time of the power outage. The cycle life of a battery is often reported at 100% depth of discharge (DOD) of the capacity and it usually corresponds to a worst-case scenario. In this paper, the impact of cycling at different DODs on LMP battery cycling performances was investigated. The depth of discharge was correlated to capacity fade and coulombic efficiency. Various cycling protocols covering a range of DODs have been applied to LMP cells at 43°C and 60°C. Analysis of the data was made considering both depth of discharge and cumulative discharge capacity throughout the test. We will report on the beneficial effect of decreasing DOD on the cycle life performances of LMP technology, resulting in a significant cycle life improvement.
机译:用作电信应用中的能量存储的电池通常不会超过其完整额定容量。这些电池大部分时间都在全充电浮动,并且在放电期间,根据停电的时间仅使用电池容量的一小部分。电池的循环寿命通常以100%的放电深度(DOD)的容量报告,并且通常对应于最坏情况的情况。本文研究了循环在不同国防部对LMP电池循环性能的影响。放电深度与容量褪色和库仑效率相关。覆盖一系列DOD的各种循环方案已在43°C和60℃下施加到LMP细胞上。考虑到整个测试中的放电和累积放电容量的深度分析。我们将报告DOD降低LMP技术的循环寿命性能的有益效果,从而产生了显着的循环生活改善。

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