Page 24 - Guide to Lithium-ion Battery Solutions

Internal Structure Evaluation
セル内部構造の非破壊観察および充放電後の劣化評価

Purpose Samples Purpose Samples

Non-destructive observation of the internal An 18650 type Lithium-ion Battery that was Non-destructive observation of an internal An 18650 type Lithium-ion Battery
structure of an exploded Lithium-ion Battery overcharged, heated, and exploded structure before and after a charge /
discharge test

Data
Charge / discharge instrument

™
™
inspeXio SMX -225CT FPD HR Plus
with attached charge / discharge system

Cross-sectional image Data

3D image (movie)
Cross-sectional image of 18650 type Lithium-ion Battery before and after a charge / discharge test

Result Result

You can see that the inside is greatly deformed by the explosion. With X-ray CT, it is possible to observe the condition The cross-sectional image of an 18650 type Lithium-ion Battery before and after a charge / discharge test is shown. As
without destroying it, so it is possible to exactly confirm what kind of deformation has occurred from a load test. shown in the red circles, you can see a deformation near the center of the battery due to expansion and contraction of
the inside caused by charging and discharging.
Even if the battery has no problem in appearance, it’s possible to observe any internal deformations using X-ray CT.

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