Search papers, labs, and topics across Lattice.
This study experimentally investigates the impact of nail penetration speed on thermal runaway in large-format Li-ion pouch cells. By varying nail insertion speeds, the authors found that slower speeds lead to self-discharge rather than thermal runaway, contrasting with the rapid thermal events observed at higher speeds. This suggests that penetration speed is a key parameter influencing battery safety and the effectiveness of safety testing.
Slower nail penetration in Li-ion batteries doesn't trigger thermal runaway, but instead causes self-discharge, revealing a critical blind spot in standard safety tests.
This study investigates the effects of nail penetration speed on the safety outcomes of large-format automotive lithium-ion pouch cells. Through six controlled tests varying the speed of nail insertion, we observed that lower penetration speeds did not induce thermal runaway; instead, the cells exhibited self-discharge while the nail remained embedded. These findings suggest that penetration speed is a critical factor in the onset of thermal runaway, providing valuable insights for the development of safer battery systems and more effective safety testing protocols.
