-Analysis of the causes of thermal runaway in power lithium battery packs

Analysis of the causes of thermal runaway in power lithium battery packs
author:enerbyte source:本站 click165 Release date: 2023-12-21 09:17:52
abstract:
Mechanical abuse Under the influence of external forces, the lithium-ion battery pack undergoes deformation and relative displacement in different parts of itself. The lithium-ion battery pack cells are also subjected to external forces, causing internal collisions, squeezin...

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Mechanical abuse

Under the influence of external forces, the lithium-ion battery pack undergoes deformation and relative displacement in different parts of itself. The lithium-ion battery pack cells are also subjected to external forces, causing internal collisions, squeezing, and punctures, which are also considered mechanical abuse.

In the abuse of machinery, the most dangerous one is puncture, where the conductor is inserted into the battery body, causing a direct short circuit between the positive and negative poles. Compared to collisions, squeezing, etc., it is only a probability that internal short circuits occur. The heat generated during the puncture process is more intense, and the probability of heating out of control is higher.

Electrical abuse

The electrical abuse of lithium-ion battery packs generally includes several forms, including external short circuit, overcharging, and overdischarging, among which overcharging is the most likely to develop into thermal runaway.

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