4.7 Article

Experimental investigation on the characteristics of thermal runaway and its propagation of large-format lithium ion batteries under overcharging and overheating conditions

Journal

ENERGY
Volume 233, Issue -, Pages -

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2021.121103

Keywords

Lithium ion battery safety; Thermal runaway; Overheat; Overcharge; Thermal runaway propagation

Funding

  1. Key Program of the Joint Fund for Civil Aviation Research with National Natural Science Foundation of China [U2033204]
  2. Key R&D Program of Guangdong Province [2020B090919004]
  3. Youth Innovation Promotion Association CAS [Y201768]

Ask authors/readers for more resources

This study investigates the characteristics and mechanism of thermal runaway (TR) and its propagation in lithium-ion batteries induced by overcharging and overheating. Results show that TR induced by overcharging is more severe than that induced by overheating, with a constant critical thermal energy for fully charged batteries.
Overcharge and overheating are two common safety issues for the large-scale application of lithium-ion batteries (LIBs), and in-depth understanding of the thermal runaway (TR) and its propagation of LIBs induced by overcharging and overheating are strongly required to guide the safety design of battery system. In this paper, investigation on characteristics and mechanism of TR and its propagation of LIBs induced by overcharging and overheating are conducted experimentally. Besides, critical thermal energy triggering TR and chemical thermal contribution are identified. The normalized critical energy triggered by overcharging and overheating to TR are also determined. The results show compared with TR induced by overheating, TR induced by overcharging exhibits a more severe and catastrophic result due to their higher heat release, more combustible gases and mass loss. In addition, critical thermal energy triggering TR may be constant for fully charged batteries under the overheating of 300 W and 400 W, which is slightly affected by heating power (Ph). Moreover, Critical chemical heat shows a certain upward trend with increasing Ph. Critical electric energy triggering TR and critical self-generated heat slightly decrease with increasing overcharge rate. In open environment, TR induced by overheating propagates faster than that induced by overcharging. (C) 2021 Elsevier Ltd. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available