Overcharge Behavior and Early Warning Analysis of LiNi_0.5Co_0.2Mn_0.3O₂/C Lithium-Ion Battery with High Capacity

Abstract

High-power lithium ion batteries have become the development focus of electric vehicles and large-scale energy storage devices. But it is also particularly critical to further study their hazardous properties under abuse conditions because higher capacity is more catastrophic. In this study, overcharge tests of 43 Ah cubic lithium ion batteries with different charge rates are conducted to study the thermal runaway behavior and parameter characteristics. Material characterization and thermal analysis tests further explain the overcharge mechanism. The emergence of voltage platform during overcharge is considered to be a significant characteristic for the high-power batteries which can be considered as an important criterion for suppressing thermal runaway. The reason for the appearance of the voltage platform is further discussed and the relevant thermal runaway critical parameters near the voltage platform under different overcharge rate are summarized. Thermal runaway risk assessment of overcharge and the critical parameter analysis of early warning are established to provide references for battery management system.

Experimental investigation on the essential cause of the degrading performances for an overcharging ternary battery

“…Until now, a quantity of research has been conducted to study the mechanism of overcharge. [17][18][19][20] Simultaneously, the influence of overcharge on the electrochemical [21][22][23] and thermal properties 24,25 is researched. When a battery experiences an overcharge condition, the cathode will be over-delithiated and the anode will be overlithiated, and a series of side reactions will accompany this condition.…”

Thermal runaway behavior and features of LiFePO 4 /graphite aged batteries under overcharge

“…The current research on overcharge‐induced thermal runaway is mainly focused on new batteries . Leising et al conducted overcharge abuse test on lithium‐ion battery with LiCoO 2 cathode.…”

“…They found that the pouch battery had better overcharge tolerance in the early stage of overcharge, while the prismatic battery had better thermal runaway buffering performance in the late stage. Jiang et al studied the voltage characteristics of lithium‐ion battery overcharged under various current rates, and proposed an early warning analysis method for thermal runaway. In addition, Ouyang's and Zhu' groups established the electrochemical‐thermal coupled model of lithium‐ion battery under overcharge, which deepened the understanding of thermal runaway mechanism of the new Li‐ion battery.…”

Precise in-situ and ex-situ study on thermal behavior of LiNi1/3Co1/3Mn1/3O2/graphite coin cell: From part to the whole cell

“…Although commercial batteries occupy a wider range of applications, they are accompanied by unknown composition and complicated structure. To solve that, coin cell can be used to further analyze the structure changes of materials and explain the phenomenon that occurs in the power battery [19]. The simple composition and structure of coin cell can reflect the performance of the material itself.…”