Quote:
Originally Posted by Chateau_Nomad
Wife just got me a Lectric bike a couple months ago. Guess I better check on the battery "history". I know certain chemistries are prone to runaway combustion.
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It is also construction. Prismatic cells are much more likely to have a problem than cylindrical cells.
Prismatic cells are made up of many positive and negative electrodes sandwiched together leaving more possibility for short circuit and inconsistency. The higher capacity makes it difficult for the BMS to protect each cell from over charging and dissipating heat. The larger cell size minimizes the possibility for automation leading to a lower degree of consistency. The internal electrodes can easily expand and contract causing deformation which can lead to a internal short circuit and are more prone to swelling similar to lead batteries.