A novel and fast method of characterizing the self-discharge behavior of lithium-ion cells using a pulse-measurement technique

作者：Schmidt Jan Philipp^*; Weber Andre; Ivers Tiffee Ellen

来源：Journal of Power Sources, 2015, 274: 1231-1238.

DOI：10.1016/j.jpowsour.2014.10.163

• Self-discharge
• Lithium ion
• Aging
• Calendar
• Storage test

This publication presents a novel method for characterizing the self-discharge behavior of lithium-ion cells, a pulse-measurement technique. This not only yields the self-discharge in terms of capacity loss, but also uses changes in the open circuit voltage to determine an equivalent self-discharge resistance, Rsof. This method is very useful; the required measurement time for characterizing self-discharge behavior is shortened by a factor of 60 (compared to a calendar test of 30 days). This measurement time improvement is also beneficial for investigating the temperature dependence of self-discharge in a lithium ion cell, enabling a quantitative evaluation. Best of all, the pulse-measurement technique can be easily implemented using commercially available measurement equipment. Nonetheless, storage experiments are still indispensable when separating reversible and irreversible capacity loss.

• 出版日期2015-1-15