Evaluating the stability of a lithium ion battery (LiB) typically involves the measurement of a few hundred charge and discharge cycles during the development stage before mass production. However, such a test method requires at least two to four months of the test period and requires repeated tests upon any change in the battery designs or chemistries. As a result, this lengthy evaluation process significantly delays the overall product development. For this reason, Samsung develops a fast evaluation method to test the stability of LiBs using a set of symmetric charge and discharge pulses at high C-rates. This set causes side reactions within the cell, which in turn lowers the state-of-charge and coulombic efficiencies (CE) of the cell compared to that before applying the pulses. By comparing the CE of the cycles with and without the pulses, the stability of LiBs in fast charge and discharge conditions are quantitatively evaluated. It is believed that the method presented in this work can reduce the evaluation time significantly, from several months to less than three days, which is beneficial to general battery research activities by significantly reducing time, resources, and cost.

评估锂离子电池（LiB）的稳定性通常涉及在批量生产之前的开发阶段中数百次充电和放电循环的测量。但是，这种测试方法需要至少两到四个月的测试时间，并且需要对电池设计或化学性质的任何变化进行重复测试。结果，漫长的评估过程大大延迟了整个产品的开发。因此，三星开发了一种快速评估方法，以一组在高C速率下对称的充电和放电脉冲来测试LiB的稳定性。与施加脉冲之前相比，该组引起电池内的副反应，从而反过来降低了电池的荷电状态和库仑效率（CE）。通过比较有无脉冲的周期的CE，对锂离子电池在快速充放电条件下的稳定性进行了定量评估。可以相信，这项工作中提出的方法可以将评估时间从几个月减少到不到三天，这可以显着减少时间，资源和成本，从而有利于一般电池研究活动。