Abstract
The role of pouch battery configurations in structural integrity under bending loads was investigated using finite elements and compared with experiments. Three-point bending tests were firstly conducted for different pouch battery configurations to obtain force–displacement curves. A finite element model of the pouch battery under the three-point bending was then simulated employing a homogenization technique to reduce the simulation cost and time consumption significantly. Force-displacement curves from the simulation results were extracted and validated by the curve obtained from the bending tests. The validation allowed detailed analysis of stress distribution and deformation inside the pouch battery model. Regions in which short circuits might occur were then identified. The role of folded configuration and pouch casing to resist flexural damage was confirmed by structural strength improvement of 14 and 30 times, respectively. These results may be used for design consideration on safer pouch batteries.
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